GOTLERAS, M. Some problems finding the volume of polyhedrons. Psichologija, [S. l.], v. 3, p. 55–59, 1962. DOI: 10.15388/Psichol.1962.3.8861. Disponível em: https://www.journals.vu.lt/psichologija/article/view/8861.. Acesso em: 6 jul. 2024.