CHAND TANDON. Performance of Pharmaceutical Stocks Pre and Post Covid-19. European Economic Letters (EEL), [S. l.], v. 12, n. 2, p. 38–44, 2022. DOI: 10.52783/eel.v12i2.91. Disponível em: https://eelet.org.uk/index.php/journal/article/view/91. Acesso em: 4 oct. 2025.