“ANALYSIS OF INTERDEPENDENCE OF ECONOMIC CYCLES IN THE SOUTHWESTERN REGION OF COLOMBIA: AN ECONOMETRIC APPROACH USING KALMAN AND HODRICK-PRESCOTT FILTERS (Article Published in Spanish)”. Estudios Gerenciales, vol. 27, no. 121, Dec. 2011, pp. 115-42, https://doi.org/10.1016/S0123-5923(11)70184-X.