JONSSON, Bjarni. The variety covering the variety of all modular lattices. Mathematica Scandinavica, Berkeley, CA, United States, v. 41, p. 5–14, 1977. DOI: 10.7146/math.scand.a-11698. Disponível em: https://journals.msp.org/mscand/article/view/1948. Acesso em: 25 jul. 2026.