1. Needle aspiration and B-mode scanning;Becker;Invest. Radiol.,1975
2. Steerable real-time sonographically guided needle biopsy;Buonocore;Am. J. Radiol.,1981
3. Ultrasonographic diagnosis of renal disease in small animals;Cartee;J. Am. Vet. Med. Assoc.,1980
4. Liver biopsy in the dog;Chapman;J. Am. Vet. Med. Assoc.,1965
5. Early diagnosis of pancreatic cancer using ultrasound and final needle aspiration cytology;Cohen,1979