Joseph R. Wax, William J. Watson, Richard C. Miller, Charles J. Ingardia, Michael G. Pinette, Angelina Cartin, Charles K. Grimes, Jacquelyn Blackstone,
Prenatal Sonographic Diagnosis of Hemivertebrae Journal of Ultrasound in Medicine. ,vol. 27, pp. 1023- 1027 ,(2008) ,
10.7863/JUM.2008.27.7.1023