@Article{ authors = " Ilpo Laine, Chung-Chun Yang", title = "Entire Solutions of Some Non-Linear Differential Equations ", journal = "Bulletin de la Société des Science et des Lettres de Łódź. Serie: Recherches sur les Déformations", issue = "2009 / Tom 59 / Numer 2", pages = "19 - 23" }