%0 Journal Article
%A Malcolm S. Robertson
%T Variational Formulae for Several Classes of Analytic Functions.
%J Mathematische Zeitschrift
%D 1970
%P 311-319
%V 118
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1970__118_171464/
%F MZ_1970__118_171464