@article{SchneidemesserSibiyaCaseiroetal.2021,
  author    = {Erika von Schneidemesser and Bheki Sibiya and Alexandre Caseiro and Tim Butler and Mark Lawrence and Joana Leitao and Aura Lupa{\c{s}}cu and Pedro Salvador},
  title     = {Learning from the COVID-19 lockdown in Berlin},
  journal   = {Atmospheric environment: X},
  series    = {Observations and modelling to support understanding policies to reduce NO2},
  volume    = {12},
  doi       = {10.1016/j.aeaoa.2021.100122},
  year      = {2021},
}