Dominique Sourdel is Professor Emeritus at l'Universite de Paris-Sorbonne and co-author of the <i Dictionaire Historique de l'Islam</i (Presses Universitaires de France).
Janine Sourdel-Thomine is Professor Emeritus at l'Universite de Paris-Sorbonne and co-author of the <i Dictionaire Historique de l'Islam</i (Presses Universitaires de France).