Gratuit
Auteur(s)Meta Djomsi D, Lacroix A, Soumah AK, Kinganda Lusamaki E, Mesdour A, Raulino R, Esteban A, Ndong Bass I, Mba Djonzo FA, Goumou S, Ndimbo-Kimugu SP, Lempu G, Mbala Kingebeni P, Bamuleka DM, Likofata J, Muyembe Tamfum JJ, Toure A, Mpoudi Ngole E, Kouanfack C, Delaporte E, Keita AK, Ahuka-Mundeke S, Ayouba A, Peeters M.