@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/}
}