SAFARYAN, R. G. The McKean martingale for the homogeneous $R-D$-systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 9, p. 1315–1319, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5936. Acesso em: 5 dec. 2025.