City Scale Particulate Matter Monitoring Using LoRaWAN Based Air Quality IoT Devices. - Steven J. Johnston; Philip James Basford; Florentin Michel Jacques Bulot; Mihaela Apetroaie-Cristea; Natasha H. C. Easton; Charlie Davenport; Gavin L. Foster; Matthew Loxham; Andrew K. R. Morris; Simon J. Cox 001 (Sensors, 2019)