@techreport{3172, title = {Confidence Sets for Ratios: A Purely Geometric Approach To Fieller's Theorem}, author = {von Luxburg, U. and Franz, VH.}, number = {133}, organization = {Max-Planck-Gesellschaft}, institution = {Max Planck Institute for Biological Cybernetics}, school = {Biologische Kybernetik}, year = {2004}, doi = {} }