Wells, P. 2003. The Sumatran rhinoceros in Way Kambas National Park, Indonesia: a study of a population exposed to catastrophic events. Unpublished report. pp. 1-36.
Wells, P. 1998. Systematic data collection protocols to estimate the distribution and population density of Sumatran rhino and the resources required to protect wild populations. Unpublished probation report: pp. 1-38.
Wells, P.; Franklin, N. 1994. Preliminary report on the current status of Sumatran rhino in Bengkulu region of Kerinci Seblat National Park. In: Soemarna, K.; Tilson, R.; Ramono, W.S.; Sinaga, D.W.; Sukumar, R.; Foose, T.J.; Traylor-Holzer, K.; Seal, U.S. 1994. Sumatran rhino in Indonesia: population and habitat viability analysis report. Apple Valley, CBSG. pp. 1-15.






