“CASE STUDY. HOW TO DEVELOP AN INVESTMENT PORTFOLIO CONSIDERING THE DIFFERENT ALTERNATIVES THAT VOLUNTARY PENSION FUNDS OFFER IN COLOMBIA: THE CASE OF SKANDIA (Article Published in Spanish)”. Estudios Gerenciales, vol. 25, no. 113, Dec. 2009, pp. 229-42, https://doi.org/10.1016/S0123-5923(09)70097-X.