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@article{PIM_1989_N_S_46_60_a13, author = {J.L. Geluk}, title = {On {Conjugate} pi-variation and the {Coefficients} of {Power} {Series}}, journal = {Publications de l'Institut Math\'ematique}, pages = {91 }, publisher = {mathdoc}, volume = {_N_S_46}, number = {60}, year = {1989}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a13/} }
J.L. Geluk. On Conjugate pi-variation and the Coefficients of Power Series. Publications de l'Institut Mathématique, _N_S_46 (1989) no. 60, p. 91 . http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a13/