Gliding ability of the Siberian flying squirrel Pteromys volans orii Asari, Yushin and Yanagawa, Hisashi and Oshida, Tatsuo, Mammal Study, 32, 151-154 (2007), DOI:http://dx.doi.org/10.3106/1348-6160(2007)32[151:GAOTSF]2.0.CO;2