Soares, J. B.; Glina, S.; Antunes Jr, N.; Wonchockier, R.; Galuppo, A. G.; Mizrahi, F. E. Sperm Tail Flexibility Test: A Simple Test for Selecting Viable Spermatozoa for Intracytoplasmic Sperm Injection from Semen Samples Without Motile Spermatozoa . Rev. Hosp. Clín. 2003, 58, 250-253.