Published in Revue Zoologique Africaine, in 1920, in volume 7, pages 201-224

Published in Revue Zoologique Africaine, in 1920, in volume 7, pages 260-283

Published in Revue Zoologique Africaine, in 1920, in volume 8, pages 1-57

Published in Revue Zoologique Africaine, Bruxelles, in 1920, in volume 8, pages 107-113

Published in Revue Zoologique Africaine, Bruxelles, in 1920, in volume 8, pages 114-115

Published in Revue Zoologique Africaine, in 1920, in volume 8, pages 118-120

Published in Revue Zoologique Africaine, in 1920, in volume 8, pages 127-147

Published in Revue de Zoologie Africaine, in 1920, in volume 8, pages 148-150

Published in Revue zool. afr, in 1920, in volume 8, pages 163-164

Published in Revue Zoologique Africaine, in 1920, in volume 8, pages 165-168

Published in Revue zool. afr, in 1920, in volume 8, pages 169-228

Published in Revue de Zoologie Africaine, in 1920, in volume 8, pages 229-260

Published in Revue Zoologique Africaine, Bruxelles, in 1920, in volume 8, pages 261-269

Published in Revue Zoologique Africaine, in 1920, in volume 8, pages 270-272