WICHMANN MATTHIESSEN, C.; WINKEL SCHWARZ, A.; FIND, S. Research centers of the world: Strength, networks and nodality. An analysisbased on bibliometric indicators. Geografisk Tidsskrift - Danish Journal of Geography, [S. l.], v. 100, 2000. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/42377. Acesso em: 23 may. 2024.