Published in Zoological Science, in 1990, in volume 7, pages 331-334

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

Published in Biol Bull, in 2001, in volume 201, pages 26-33

Created: 2010-01-07, modified: 2011-06-21

Published in Gardens' Bulletin Singapore, in 1982, in volume 35, issue 1, pages 51-63

Created: 2018-12-17, modified: 2018-12-17

Published in Gardens' Bulletin, Singapore, in 1998, in volume 50, issue 1, pages 171-183

Created: 2014-06-20, modified: 2014-06-20