Ortiz, A. R., and J. M. Caicedo, "Comparing closed loop control models and mass-spring-damper models for human structure interaction problems", International Modal Analysis Conference, IMAC XXXIII, Orlando, FL., Society for Experimental Mechanics, SEM., 02/2015.
Davis, B. T., J. M. Caicedo, B. M. Easterling, and A. R. Ortiz, Implementation of a Human Activity Monitoring System, , Columbia, SC, WJBD VA Hospital, 2015.
Ortiz, A. R., P. Thomson, and D. Gómez, "Effects of human-structure interaction on the dynamic properties of a grandstand", Revista Ingeniería y Competitividad, vol. 14, issue 1, pp. 63-73, 06/2012.
Ortiz, A. R., P. Thomson, and D. Gómez, "Characterizing the human-Structure interaction effect of the Olympic Stadium in Cali", Revista Ingeniería e Investigación, vol. 29, issue 1, pp. 13-23, 04/2009.