Usongo, Leonard

• Pachyderm Vol. 34 (2003): Pachyderm - Research And Review
  Preliminary results on movements of a radio-collared elephant in Lobéké National Park, south-east Cameroon
  Abstract  PDF
• Pachyderm Vol. 43 (2007): Pachyderm - Research
  Preliminary survey of forest elephant crossings in Sangha Trinational Park, central Africa
  Abstract  PDF