Measure Together in publication about citizen science in Frontiers  
Frontiers | Citizen Science and Environmental Protection Agencies: Engaging Citizens to Address Key Environmental Challenges

Farmers and Neighbours in Sensors
Sensors | Farmers and Local Residents Collaborate: Application of a Participatory Citizen Science Approach to Characterising Air Quality in a Rural Area in The Netherlands 

A publication on the calibration of NO2 sensors. 
Ratingen, S.v.; Vonk, J.; Blokhuis, C.; Wesseling, J.; Tielemans, E.; Weijers, E. Seasonal Influence on the Performance of Low-Cost NO₂ Sensor Calibrations. Sensors 2021, 21, 7919. https://doi.org/10.3390/s21237919 Sensors | Free Full-Text | Seasonal Influence on the Performance of Low-Cost NO2 Sensor Calibrations | HTML (mdpi.com)

A publication on the "Snifferbike", the use of PM sensors on bikes. 
Wesseling, Joost; Hendricx, Wouter; de Ruiter, Henri; van Ratingen, Sjoerd; Drukker, Derko; Huitema, Maaike; Schouwenaar, Claar; Janssen, Geert; van Aken, Stephen; Smeenk, Jan W.; Hof, Arjen; Tielemans, Erik. 2021. "Assessment of PM_2.5 Exposure during Cycle Trips in The Netherlands Using Low-Cost Sensors" Int. J. Environ. Res. Public Health 18, no. 11: 6007. https://doi.org/10.3390/ijerph18116007

A publication on the "Samen Meten" data platform and use of sensors in the Netherlands.
Joost Wesseling, Henri de Ruiter, Christa Blokhuis, Derko Drukker, Ernie Weijers, Hester Volten, Jan Vonk, Lou Gast, Marita Voogt, Peter Zandveld, Sjoerd van Ratingen and Erik Tielemans, Development and Implementation of a Platform for Public Information on Air Quality, Sensor Measurements, and Citizen Science, Atmosphere 2019, 10(8), 445

Classification of sensors by the information they use and provide.
Philipp Schneider, Alena Bartonova, Nuria Castell, Franck R. Dauge, Michel Gerboles, Gayle S.W. Hagler, Christoph Hüglin, Roderic L. Jones, Sean Khan, Alastair C. Lewis, Bas Mijling, Michael Müller, Michele Penza, Laurent Spinelle, Brian Stacey, Matthias Vogt, Joost Wesseling, and Ronald W. Williams, Toward a Unified Terminology of Processing Levels for Low-Cost Air-Quality Sensors, Environmental Science & Technology 2019; 53(15):8485-7

General information on Citizen Science
Hester Volten, et al. Enhancing national environmental monitoring through local citizen science. In: Citizen Science: Innovation in Open Science, Society and Policy, Susanne Hecker et al., eds. London: UCL Press, London, 2018: 337–52

Using sensors in the urban environment
Qijun Jiang, Frank Kresin, Arnold K. Bregt, Lammert Kooistra, Emma Pareschi, Edith van Putten, Hester Volten, and Joost Wesseling, Citizen Sensing for Improved Urban Environmental Monitoring. Journal of Sensors 2016; 2016:5656245

Information on the use of air quality sensors in Citizen Science.
Assessing air quality through citizen science, EEA, Copenhagen, 2019

Bartonova et al. Low cost sensor systems for air quality assessment: possibilities and challenges, 2019. ETC/ACM report no. 2018/21

José Miguel Rubio Iglesias, Triin Edovald, Robert Grew, Timo Kark, Ahmet Erkan KIDEYS, Taru Peltola, Hester Volten. Citizen Science and Environmental Protection Agencies: engaging citizens to address key environmental challenges. Front. Clim., 04 December 2020.

Publications: Evaluation sensors and calibrations methods 

Joel Kuula, Timo Mäkelä, Minna Aurela, Kimmo Teinilä, Samu Varjonen, Óscar González, and Hilkka Timonen. Laboratory evaluation of particle-size selectivity of optical low-cost particulate matter sensors. Atmos. Meas. Tech., 13, 2413–2423, 2020

Karin Ardon-Dryer, Yuval Dryer, Jake N. Williams, and Nastaran Moghimi. Measurements of PM2.5 with PurpleAir under atmospheric conditions.  Atmos. Meas. Tech., 13, 5441–5458, 2020

Adnan Masic, Dzevad Bibic, Boran Pikula, Almir Blazevic, Jasna Huremovic, and Sabina Zero. Evaluation of optical particulate matter sensors under realistic conditions of strong and mild urban pollution. Atmos. Meas. Tech., 13, 6427–6443, 2020

Karoline K. Barkjohn, Brett Gantt, and Andrea L. Clements. Development and Application of a United States wide correction for PM2.5 data collected with the PurpleAir sensor.  Atmos. Meas. Tech Preprint, 2021

Ashley Collier-Oxandale, Brandon Feenstra, Vasileios Papapostolou, Hang Zhang, Michelle Kuang, Berj Der Boghossian, Andrea Polidori. Field and laboratory performance evaluations of 28 gas-phase air quality sensors by the AQ-SPEC program. Atmos Environ 2020, 220: 117092

Peng Wei, Zhi Ning, Sheng Ye, Li Sun, Fenhuan Yang, Ka Chun Wong, Dane Westerdahl, Peter K K Louie. Impact Analysis of Temperature and Humidity Conditions on Electrochemical Sensor Response in Ambient Air Quality Monitoring. Sensors 2018; 18(2):59

Alice Cavaliere, Federico Carotenuto, Filippo Di Gennaro, Beniamino Gioli, Giovanni Gualtieri, Francesca Martelli, Alessandro Matese, Piero Toscano, Carolina Vagnoli and Alessandro Zaldei. Development of Low-Cost Air Quality Stations for Next Generation Monitoring Networks: Calibration and Validation of PM2.5 and PM10 Sensors. Sensors 2018; 18(9): 2843

Abdul Samad, Daniel Ricardo Obando Nuñez, Grecia Carolina Solis Castillo, Bernd Laquai and Ulrich Vogt. Effect of Relative Humidity and Air Temperature on the Results Obtained from Low-Cost Gas Sensors for Ambient Air Quality Measurements. Sensors 2020; 20(18): 5175

Spinelle L. et al.,  Field calibration of a cluster of low-cost commercially available sensors for air quality monitoring. Part B: NO, CO and CO2, Sensors and Actuators B, 2016.

Spinelle L. et al., “Evaluation of Metal Oxides sensors for the monitoring of NO2 and O3 in ambient air at ppb level” , Chemical Engineering Transactions, 2016.

Aleixandre M. et al., “Calibration of ozone sensor with switch on off operation mode” , Chemical Engineering Transactions, 2016.

Spinelle L. et al., Performance Evaluation of Amperometric Sensors for the Monitoring of O3 and NO2 in Ambient Air at ppb level, Procedia Engineering, Vol. 120, pp 480-483, 2015.

Spinelle L. et al., Field calibration of a cluster of low-cost available sensors for air quality monitoring. Part A: Ozone and nitrogen dioxide, Sensors and Actuators B, 2015.

Spinelle L. et al., Sensitivity of VOC Sensors for Air Quality Monitoring within the EURAMET Key-VOC project, proceedings AMA science, 2015, EURAMET Key-VOC project. 

Spinelle L. et al., 2014. Calibration of a cluster of low-cost sensors for the measurement of air pollution in ambient air. In 2014 IEEE SENSORS.

Aleixandre M. et al., 2013. Calibration of small resistive commercial sensors to measure ozone with the interference of temperature and humidity. In 2013 IEEE Sensors. 2013 IEEE Sensors. pp. 1–4.

Karagulian, F., et al., Evaluation of a portable nephelometer against the Tapered Element Oscillating Microbalance method for monitoring PM 2.5,  J. Environ. Monit., Vol. 14, pp 2145-2153, 2012.

Aleixandre, M. and Gerboles M., Review of Small Commercial Sensors for Indicative Monitoring of Ambient Gas, VOL. 30, 2012, Chemical Engineering Transactions.