@article{BUMI_1956_3_11_2_a13,
     author = {Piranian, George},
     title = {The orders of lacunarity of a power series.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {198--199},
     publisher = {mathdoc},
     volume = {Ser. 3, 11},
     number = {2},
     year = {1956},
     zbl = {0072.06701},
     mrnumber = {79084},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1956_3_11_2_a13/}
}