ARJAS, E.; SPEED, T. P. Topics in Markov Additive Processes. MATHEMATICA SCANDINAVICA, [S. l.], v. 33, p. 171–192, 1973. DOI: 10.7146/math.scand.a-11482. Disponível em: https://tidsskrift.dk/math/article/view/11482. Acesso em: 14 aug. 2026.