GEČIAUSKAS, E. On linear and planar discovery. Lithuanian Mathematical Journal, [S. l.], v. 5, n. 2, p. 227–231, 1965. DOI: 10.15388/LMJ.1965.19556. Disponível em: https://journals.vu.lt./LMJ/article/view/19556.. Acesso em: 21 nov. 2024.