Araki, Y, Ogawa, S, Ohno, M, Yoshizawa, M, Motoyama, M, Araki, S, Aslam, I, Fishel, S: Successful metaphase chromosome analysis of human elongated spermatids using mouse oocytes. Mol Hum Reprod (1999) 5:784-787

Takahashi, K, Araki, Y, Motoyama, M: Normal development of a zona-free oocyte to the blastocyst stage following ICSI. Hum Reprod (1999) 14:2677