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@article{MZ_1927__26_167931, author = {T Rad\'o}, title = {Bemerkung \"uber das {DoppeIintegral} ?? (1+p2+q2) {\textonehalf} dx dy}, journal = {Mathematische Zeitschrift}, pages = {408--416}, publisher = {mathdoc}, volume = {26}, year = {1927}, url = {http://geodesic.mathdoc.fr/item/MZ_1927__26_167931/} }
T Radó. Bemerkung über das DoppeIintegral ?? (1+p2+q2) ½ dx dy. Mathematische Zeitschrift, Tome 26 (1927), pp. 408-416. http://geodesic.mathdoc.fr/item/MZ_1927__26_167931/