%0 Journal Article %A Olli LEHTO %T On an extension of the concept of deficiency in the theory of meromorphic functions %J Mathematica Scandinavica %D 1953 %P 207-212 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1953__1_165500/ %F MS2_1953__1_165500