LAPINSKAS, R. The asymptotical expansions for the density of the sum of multidimensional random variables combined into nonhomogeneous Markov chain. Lithuanian Mathematical Journal, [S. l.], v. 12, n. 1, p. 155–163, 1972. DOI: 10.15388/LMJ.1972.21088. Disponível em: https://www.journals.vu.lt/LMJ/article/view/21088.. Acesso em: 28 apr. 2024.