| Schenkel, R., 1978. Udjung Kulon, Java - management and protection. WWF Yearbook 1977-1978: 94-95
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| Schenkel, R., 1973. Operatie neushoorn, 'Operasi badak', op het spoor van een der zeldzaamste dieren ter wereld. Zwolle, La Riviere and Voorhoeve, pp. 1-213
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| Schenkel, R.; Schenkel, L., 1973. Project 839/840: Protection and management of the Udjung Kulon National Park for the Javan rhinoceros and other species. WWF Yearbook 1972-1973: 128-132
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| Schenkel, R., 1971. Mission Nashorn: auf der Fahrte des seltensten Saugetiers der Welt. Bern and Stuttgart, Hallwag, pp. 1-219
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| Schenkel, R.; Schenkel, L., 1969. Report on a survey trip to Riau area and the Mt Leuser Reserve to check the situation of the Sumatran rhino and the Orang utan (21 August to 13 Septembr 1969). Report to WWF, pp. 1-7
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