Regrowth of residual ruptured aneurysms treated by Guglielmi's detachable coils which demanded further treatment by surgical clipping: report of 7 cases and review of the literature. - Conrad,M.D.; Pelissou-Guyotat,I.; Morel,C.; Madarassy,G.; Schonauer,C.; Deruty,R. (Acta Neurochir (Wien), 2002)