Published in Gardens’ Bulletin Singapore, in 2015, in volume 67, issue 1, pages 95-99

Created: 2017-04-12, modified: 2017-04-12

Published in Gardens' Bulletin, Singapore, in 2013, in volume 65, issue 2, pages 157-162

Created: 2017-05-21, modified: 2017-05-21

Published in Pacific Science, in 1965, in volume 19, issue 4, pages 498-501

Created: 2017-09-10, modified: 2017-09-10