LIGHTOWLER, C.H., MERCADO, M.C. and GARCIA LIÑEIRO, J.A. 1998. Windows and reference echotomograms for bidimensional real-time echocardiogram of horses. Archivos de Medicina Veterinaria. 30, 1 (Jun. 1998), 143–151. DOI:https://doi.org/10.4067/S0301-732X1998000100017.