| | | 2004 | 272 |
| | | 2011 | 344 |
| | | 2009 | 112 |
| | | 2003 | 175 |
| | | 2004 | 175 |
| | | 1990 | 108 |
| | | 1995 | 89 |
| | | 1997 | 278 |
| HistoryJournal:The Gardens' Bulletin, Singapore | | 1995 | 98 |
| | | 2002 | 112 |
| MammalsJournal:The Gardens' Bulletin, Singapore | | 1995 | 140 |
| | | 1986 | 112 |
| | | 2005 | 223 |
| | | 2001 | 166 |
| | | 2005 | 191 |
| | | 1993 | 173 |
| | | 2002 | 146 |
| | | 2008 | 136 |
| | | 2006 | 138 |
| | | 2006 | 152 |