@article{JMPA_1923_9_2__1_0,
     author = {Wilczynski, E.-J.},
     title = {Differential {Properties} of {Functions} of a {Complex} {Variable} which are {Invariant} under {Linear} {Transformations}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {1--51},
     publisher = {Gauthier-Villars},
     volume = {Ser. 9, 2},
     year = {1923},
     language = {en},
     url = {http://www.numdam.org/item/JMPA_1923_9_2__1_0/}
}