LINDSTRÖM, B. On $P$-polynomial representations of projective geometries in algebraic combinatorial geometries. MATHEMATICA SCANDINAVICA, [S. l.], v. 63, p. 36–42, 1988. DOI: 10.7146/math.scand.a-12223. Disponível em: https://www.mscand.dk/article/view/12223. Acesso em: 27 apr. 2024.