@article{CM_1939__6__228_0,
     author = {Kupradze, V.},
     title = {Zur {Frage} der {Ausbreitung} elektromagnetischer {Wellen} in einem inhomogenen ebenen {Medium}},
     journal = {Compositio Mathematica},
     pages = {228--234},
     publisher = {Johnson Reprint Corporation},
     volume = {6},
     year = {1939},
     zbl = {0021.17803},
     language = {de},
     url = {http://archive.numdam.org/item/CM_1939__6__228_0/}
}