@article{CM_1935__1__383_0, author = {Petrowsky, I.}, title = {Zur ersten Randwertaufgabe der W\"armeleitungsgleichung}, journal = {Compositio Mathematica}, pages = {383--419}, publisher = {Johnson Reprint Corporation}, volume = {1}, year = {1935}, zbl = {0010.29903}, language = {de}, url = {archive.numdam.org/item/CM_1935__1__383_0/} }
Petrowsky, I. Zur ersten Randwertaufgabe der Wärmeleitungsgleichung. Compositio Mathematica, Tome 1 (1935) , pp. 383-419. http://archive.numdam.org/item/CM_1935__1__383_0/