MAP20110070526 Ng, A.C-Y. Valuing variable annuity guarnatees with the multivariate Esscher transform / A.C. -Y Ng, J.S.-H. Li En: Insurance : mathematics and economics. - Oxford : Elsevier, 1990- = ISSN 0167-6687. - 01/11/2011 Tomo 49 Número 3 - 2011