@book {CS-DS-90,
	title = {Steady State Performance Evaluation of Totally Open Systems of Markovian Sequential Processes},
	year = {1990},
	pages = {427-438},
	publisher = {Elsevier Science Publishers BV, North Holland},
	organization = {Elsevier Science Publishers BV, North Holland},
	author = {J. Campos and M. Silva},
	editor = {M. Cosnard and C. Girault}
}

