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 Unpublished report.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 Unpublished probation report: pp. 1-38.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.






