%0 Journal Article %A Roman Sikorski %T On the definition of multi-valued analytic functions %J Colloquium Mathematicum %D 1961 %P 267-269 %V 8 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-8-2-267-269/ %R 10.4064/cm-8-2-267-269 %G en %F 10_4064_cm_8_2_267_269