DRESS, A.; HOCHSTÄTTLER, W.; KERN, W. Modular Substructures in Pseudomodular Lattices. Mathematica Scandinavica, Berkeley, CA, United States, v. 74, p. 9–16, 1994. DOI: 10.7146/math.scand.a-12475. Disponível em: https://journals.msp.org/mscand/article/view/1150. Acesso em: 24 jul. 2026.