GREBENYUK, M. F.; KLOKOVA, L. F. Projective connection space. Proceedings of National Aviation University (archive), [S. l.], v. 17, n. 2, p. 73–76, 2003. DOI: 10.18372/2306-1472.2.11918. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/11918. Acesso em: 14 jun. 2026.