Hierarchical author networks: An analysis of European molecular biology laboratory (EMBL) publications. - Merwan Abd el Kader; Tiiu Ojasoo; Jean-François Miquel; Yoshiko Okubo; Jean-Christophe Doré (Scientometrics, 1998)

Scientific publications of China in 1994: Evolution or revolution? - Bernard Mély; Merwan Abd el Kader; Gérard Dudognon; Yoshiko Okubo (Scientometrics, 1998)