Klinefelter GR, Welch JE, Perreault SD, Moore HD, Zucker RM, Suarez JD, Roberts NL, Bobseine K, Jeffay S. Localization of the sperm protein SP22 and inhibition of fertility in vivo and in vitro. J Androl. 2002 Jan;23(1):48–63. doi: 10.1002/jand.2002.23.1.48. PMID: 11780923.