MAP20120025851 Kolkiewicz, Adam Semi-Static hedging for GMWB in variable annuities / Adam Kolkiewicz , Yan Liu En: North American actuarial journal. - Schaumburg : Society of Actuaries, 1997- = ISSN 1092-0277. - 01/03/2012 Tomo 16 Número 1 - 2012 I. Title.