Pérez, M., Ramírez, G., Pérez, M. and Restrepo, P. (2007) “Validation of an analytical method for the determination of valsartan in human plasma by HPLC/UV with addition standard using losartan as an internal standard”., Colombia Medica, 38(1), pp. 13–20. doi: 10.25100/cm.v38i1.469.