@article{MZ_1939__45_168846,
     author = {K., Maruhn},
     title = {\"Uber ein {Existenzproblem} der {Hydrodynamik}},
     journal = {Mathematische Zeitschrift},
     pages = {155--175},
     year = {1939},
     volume = {45},
     zbl = {65.0971.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__45_168846/}
}