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). estud.gerenc. [Internet]. 2009 Dec. 31 [cited 2026 Oct. 21];25(113):229-42. Available from: https://www.icesi.edu.co/revistas/index.php/estudios_gerenciales/article/view/327