GROSS, H.; KELLER, H. A. On the problem of classifying infinite chains in projective and orthogonal geometry. Annales Fennici Mathematici, [S. l.], v. 8, n. 1, p. 67–86, 1983. DOI: 10.5186/aasfm.1983.0812. Disponível em: https://afm.journal.fi/article/view/134458. Acesso em: 25 nov. 2024.