@article{article2d437961,
title   = {Air Quality during COVID-19 in Four Megacities: Lessons and Challenges for Public Health},
author = {Connerton, Patrick Joseph and Assunção, João Vicente de and Miranda, Regina Maura de and Slovic, Anne Dorothée and Perez-Martinez, Pedro José and Ribeiro, Helena},
year = {2020},
doi = {10.3390/ijerph17145067},
journal   = {International journal of environmental research and public health}
}