Chua, P. V., Ong, M. G., Tumbaga, E., & Vital, M. K. (2001). An optimal portfolio mix for stable and turbulent times: A study on Philippine assets using a modified Markowitz mean-variance model for the years 1990-2000. Animo Repository.

Chua, Paul Vincent, Marie Grace Ong, Elinore Tumbaga, و Ma. Katrina Vital. An Optimal Portfolio Mix for Stable and Turbulent Times: A Study On Philippine Assets Using a Modified Markowitz Mean-variance Model for the Years 1990-2000. Animo Repository, 2001.

Chua, Paul Vincent, Marie Grace Ong, Elinore Tumbaga, و Ma. Katrina Vital. An Optimal Portfolio Mix for Stable and Turbulent Times: A Study On Philippine Assets Using a Modified Markowitz Mean-variance Model for the Years 1990-2000. Animo Repository, 2001.