VOSYLIUS, R. Zur Frage der Geometrie der homogenen Räume. Lithuanian Mathematical Journal, [S. l.], v. 9, n. 1, p. 43–55, 1969. DOI: 10.15388/LMJ.1969.20665. Disponível em: https://www.zurnalai.vu.lt/LMJ/article/view/20665. Acesso em: 3 may. 2025.