1. Burns P: Principles of US. In: Rifkin M (ed.):Syllabus Special Course: Ultrasound 1991. Oak Brook: RSNA Publications, 1991, pp 33–56
2. Siegel M: Practical CT techniques. In: Siegel M (ed):Pediatric Body CT. New York: Churchill Livingstone, 1988, pp 1–27
3. Sty Y, Wells R: Other abdominal and pelvic masses in children.Sem Roentgenol 23:216–231, 1988
4. Boechat M: Magnetic resonance imaging of abdominal and pelvic masses in children.Top Magn Reson Imaging 3:25–42, 1990
5. Cohen H, Haller J: Pediatric and adolescent genital abnormalities.Clin Diagn Ultrasound 24:187–216, 1989