Alborno, T ; Hofmann, T ; Lackner, A... Anderhuber W, Stammberger H, Walch C, Fock CH, Regauer S, Luxenberger W, Gotschuli A. Rigid endoscopy in minimally invasive therapy of tumors of the paranasal sinuses and skull base. Min Invas Ther Allied Technol. 1999;8:25-32..
,
2009