1. Doppler;CERRI G.G.,1998
2. Echocardiography;CERRI G.G.,1986
3. Abdominal vascular sonography;FINN-BODNER S.T.;Veterinary Clinics of North America: Small Animal Practice,1998
4. Ultra-sonografia abdominal;KAWAKAMA J.,1993
5. Small animal diagnostic ultrasound;KAWAKAMA J.,2002