MACKEVIČIUS, Vigirdas. On positive approximations of positive diffusions. Lietuvos matematikos rinkinys, [S. l.], v. 47, n. spec., p. 58–62, 2007. DOI: 10.15388/LMR.2007.18182. Disponível em: https://test.zurnalai.vu.lt/LMR/article/view/18182. Acesso em: 28 oct. 2025.