SKORDEV, Dimiter. Some Aspects of Distancing. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 75, n. 1, p. 3–10, 2022. DOI: 10.7546/CRABS.2022.01.01. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/1. Acesso em: 2 nov. 2026.