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♦ ¹Seasonal Variation in the Feeding Ecology of the Grey-cheeked Mangabey (Lophocebus albigena) in Cameroon, JOHN R. POULSEN, CONNIE J. CLARK, AND THOMAS B. SMITH, American Journal of Primatology 54:91–105 (2001)
♦ ²Seed dispersal by Ceratogymna hornbills in the Dja Reserve, Cameroon, KENNETH D. WHITNEY, MARK K. FOGIEL, AARON M. LAMPERTI, KIMBERLY M. HOLBROOK, DONALD J. STAUFFER, BRITTA DENISE HARDESTY, V. THOMAS PARKER and THOMAS B. SMITH, Journal of Tropical Ecology (1998) 14:351–371