@article{JDM_1894__4_144517,
     author = {A. Sommerfeld},
     title = {Diffractionsprobleme in exacter {Behandlung.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {172--174},
     publisher = {mathdoc},
     volume = {4},
     year = {1894},
     zbl = {28.0746.01},
     url = {http://geodesic.mathdoc.fr/item/JDM_1894__4_144517/}
}