While livingabroad, he observed African social and cultural practices as an ethnographer and wrote prolifically on the subject matter, publishing his works in French, Dutch and English. The first article to be published in 1957 was Le paternalisme: une doctrine belge de politique indigène which discussed Belgium's paternalism in foreign policy towards its colony in the Congo. His most famous work was the monograph 'Belgian Colonial Administration' published in 1961. In between 1957 and 1961 he published a number of smaller articles dealing with a number of topics, including the article Le Problème des élites au Congo belge and Pluralisme ethnique et culturel au Congo Belge.