Akishi Onishi, Satoshi Koike, Miki Ida, Hiroo Imai, Yoshinori Shichida, Osamu Takenaka, Akitoshi Hanazawa, Hidehiko Konatsu, Akichika Mikami, Shunji Goto, Bambang Suryobrotoq, Kenji Kitahara, Tetsuo Yamamori,
Dichromatism in macaque monkeys. Nature. ,vol. 402, pp. 139- 140 ,(1999) ,
10.1038/45966