Northern, T., The arts of Cameroon, New Haven, 1984, fig.117
Northern, T., Expressions of Cameroon Art, The Franklin Collection, Beverly Hills, 1986, fig.3
Robbins, W., Nooter, N., African arts in American private collections: Survey 1989, Washington, 1989, fig.844
The Art of Cameroun, 1984-1985
National Museum of Natural History (Washington); Houston Museum of Fine Arts; New Orleans Museum of Art; Field Museum of Natural History (Chicago); American Museum of Natural History (New York).
Expressions of Cameroon Art, The Franklin Collection, 1986-1989
Los Angeles County Museum of Natural History; The Baltimore Museum of Art; Hood Museum of Art (Hanover); Dayton Art Institute; Flint Institute of Arts; Palo Alto Cultural Center.