BIKELIS, A. The asymptotic expansions of the distribution function and of density function for the sums of independent identically distributed random vectors. Lithuanian Mathematical Journal, [S. l.], v. 8, n. 3, p. 405–422, 1968. DOI: 10.15388/LMJ.1968.20580. Disponível em: https://www.journals.vu.lt/LMJ/article/view/20580. Acesso em: 11 apr. 2025.