Published in Zoological Science, in 1990, in volume 7, pages 79-84

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Published in Zoological Science, in 1992, in volume 9, pages 397-404

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Published in Zoological Science, in 1991, in volume 8, pages 865-867

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Published in Mammal Study, in 1996, in volume 21, pages 153-159

Created: 2014-09-25, modified: 2014-09-25

Published in Zoological Science, in 1988, in volume 5, pages 449-461

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Published in Zoological Science, in 1994, in volume 11, pages 745-752

Created: 2012-09-19, modified: 2012-09-19