Patrick Williams is the director of research at the Centre National de la Recherche Scientifique in Paris. His numerous publications on Gypsy groups include Mariage Tsigane; Tsiganes: Identité, évolution; Les Tsiganes de Hongrie et leurs musiques; and Django.

Catherine Tihanyi, an anthropologist and translator, is a research associate in the Department of Anthropology at Western Washington University.