Kenji Hosoda, Hideki Sasahara, Kei Matsushita, Yasuaki Tamura, Makoto Miyaji, Hiroki Matsuyama. Anthocyanin and proanthocyanidin contents, antioxidant activity, and in situ degradability of black and red rice grains. Asian-Australasian Journal of Animal Sciences. 2018. 31. 8. 1213-1220