1. Ascites: ultrasound guidance or blind paracentesis?;Bard C;Can Med Assoc J,1986
2. Diagnostic peritoneal lavage before and after abdominal surgery in dogs;Bjorling DE;Am J Vet Res,1983
3. The needle tip echo
4. Evaluation of a focused assessment with sonography for trauma protocol to detect free abdominal fluid in dogs involved in motor vehicle accidents
5. 2001. An in‐vitro study to understand successful free‐hand ultrasound guided intervention;Bradley MJ;Crit Radiol,2001