NERSESIAN, V. A. POSSIBLE COMPLEXES OF THREE-DIMENSIONAL PLANES IN PROJECTIVE SPACE  P6. II. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 36, n. 1 (197), p. 34–38, 2002. DOI: 10.46991/PYSUA.2002.36.1.034. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol36_no1_2002_pp034-038. Acesso em: 21 jan. 2026.