MAP20140037032 Ulm, Eric R. Analytic solution for ratchet guaranteed minimum death benefit options under a variety of mortality laws / Eric R. Ulm En: Insurance : mathematics and economics. - Oxford : Elsevier, 1990- = ISSN 0167-6687. - 01/09/2014 Volumen 58 Número 1 - septiembre 2014 I. Title.
