Référence: Sonographic definition of the empty follicle syndrome
Hilgers, T. W.; Dvorak, A. D.; Tamisiea, D. F.; Ellis, R. L.; Yaksich, P. J. Sonographic definition of the empty follicle syndrome. Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine 1989: PMID: 2668550