Morphology and amplitude values of the electrocardiogram of Spanish-bred horses of different ages in the Dubois leads systemIgnacio Ayala, Cándido Gutierrez-Panizo, José Luis Benedito, Felipe Prieto and Ana MontesVet. Res., 31 3 (2000) 347-354DOI: https://doi.org/10.1051/vetres:2000124