LINDSTRÖM, Bernt. On $P$-polynomial representations of projective geometries in algebraic combinatorial geometries. Mathematica Scandinavica, Berkeley, CA, United States, v. 63, p. 36–42, 1988. DOI: 10.7146/math.scand.a-12223. Disponível em: https://journals.msp.org/mscand/article/view/1439. Acesso em: 24 jul. 2026.