Goldschmidt, R. and Rodrigo Espiúca dos Anjos Siqueira 2021. Essential Services During Covid19 Pandemics: Challenges To Labour Law And Its Constitutional Principles. Prim@ Facie - Law, History and Politics. 20, 43 (Mar. 2021). DOI:https://doi.org/10.22478/ufpb.1678-2593.2021v20n43.53760.