MAP20100069745 Afonso, Lourdes B. Calculating continuous time ruin probabilities for a large portfolio with varying premiums / Lourdes B. Afonso, Alfredo D. Egídio dos Reis, Howard R. Waters En: Astin bulletin. - Belgium : ASTIN and AFIR Sections of the International Actuarial Association = ISSN 0515-0361. - 01/05/2009 Tomo 39 Número 1 - 2009 , p. 117-136 I. Egídio dos Reis, Alfredo D. . II. Waters, Howard R. . III. Title.