Significance of Affinity and Cooperativity in Oxygen Binding to Hemoglobin of Horse Fetal and Maternal Blood Zhang, Yan and Kobayashi, Keiko and Sasagawa, Keisuke and Imai, Kiyohiro and Kobayashi, Michiyori, Zoological Science, 20, 1087-1093 (2003), DOI:http://dx.doi.org/10.2108/zsj.20.1087