Analysis of information sources in references of the Wikipedia article "Yves Coppens" in French language version.
« p127-128 : [...] after Arambourg's death Coppens invited Howell's group to move down to the French concession [at Omo] and work a small section at its northern end. [...] p133-134 : [...] I made an agreement with Taieb and Coppens to organize a formal expedition. This would be a truly cooperative international affair and would avoid the separatist difficulties of Omo. Funds would be raised and personnel recruited individually, but the work in the deposits would be jointly conducted. Taieb would be chief geologist, Coppens chief paleontologist, and I would be chief paleoanthropologist. We drew up a formal agreement specifying our various responsibilities, and the International Afar Research Expedition came into being. [...] »
« [...] Mary and Richard Leakey confirmed my diagnosis of the knee joint: hominid. That was a vast relief to me. I took it to Paris, where Taieb and Coppens made their own formal press release "to the world," thereby gaining their share of the credit—important to them for future fund-raising and continued government support. [...] »
« Yves Coppens n’était pas sur le terrain à ce moment précis, mais, en tant que cofondateur de l’IARE, il a partagé, comme convenu, la paternité de la découverte avec son jeune collègue américain. »
« [...] Lucy exhumée, les accords de l'IARE pour ce qui est des préséances de publications et de l'accès aux fossiles seront respectés [...]. Mais le travail d'interprétation de l'espèce sera chasse gardée américaine. [...] »