JÓNSSON, Bjarni. Modular lattices and Desargues’ theorem. Mathematica Scandinavica, Berkeley, CA, United States, v. 2, p. 294–313, 1954. DOI: 10.7146/math.scand.a-10416. Disponível em: https://journals.msp.org/mscand/article/view/2906. Acesso em: 25 jul. 2026.