Published in Gardens' Bulletin, Singapore, in 2004, in volume 56, issue 1, pages 147-152

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

Published in Gardens' Bulletin Singapore, in 2017, in volume 69, issue 2, pages 201-210

Created: 2018-09-17, modified: 2018-09-17

Published in The Beagle, in 2008, in volume 24, pages 151-155

Created: 2021-08-30, modified: 2021-08-30