Riveros Pérez, E., F. García, A. Valero, M. Roa, and P. Rojas. “Comparison of Cardio-Respiratory Physiological Variables During Exercise in Medical Students”. RFS Revista Facultad De Salud, vol. 4, no. 1, Jan. 2012, pp. 19-27, doi:10.25054/rfs.v4i1.116.