1. Physical principles, instrumentation, and safety of diagnostic ultrasound;Nyland,2002
2. Performing the complete abdominal ultrasound evaluation;Baker,2004
3. Artifacts;Penninck,2002
4. Ovulation timing; concepts and controversies;Goodman;Vet Clin North Am Small Anim Pract,2001
5. Urinary tract;Nyland,2002