Published in Zoological Science, in 1994, in volume 11, pages 537-545

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

Published in Zoological Science, in 1993, in volume 10, pages 903-912

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

Published in Zoological Science, in 1990, in volume 7, pages 401-407

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