Cerrato-Álvarez, Maria, Conrado Miró-Rodríguez, y Eduardo Pinilla-Gil. «EFFECT OF COVID-19 LOCKDOWN ON AIR QUALITY IN URBAN AND SUBURBAN AREAS OF EXTREMADURA, SOUTHWEST SPAIN: A CASE STUDY IN USUALLY LOW POLLUTED AREAS». Revista Internacional de Contaminación Ambiental 37 (marzo 4, 2021): 237–247. Accedido enero 23, 2022. https://www.revistascca.unam.mx/rica/index.php/rica/article/view/RICA.54145.