@Book{RANME20161574554, title = "Effect of normalization by means of orthogonal precordial calibration on the differences between the tetrahedron, corrected tetrahedron, HCB, MC fee and Frank frontal plane vectorcardiograms", author = "LEPESCHKIN, Eugen", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=59455", year = "1972", }