| Strien, N.J. van, 1997. Das Sumatra-Nashorn: pp. 57-74, map 1
| In: Anonymous Die Nashoerner: Begegnung mit urzeitliche Kolossen. Fuert, Filander Verlag: pp. 1-258 |
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| Strien, N.J. van, 1997. Activity and performance reporting for the rhino protection units. Report to the Conservation Management Division of the Leuser Management Unit: pp.1-40
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| Strien, N.J. van, 1997. Sumatran rhino conservation plan. Report to the Conservation Management Division of the Leuser Management Unit: pp.1-45
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