@article{MZ_1926__25_167882,
     author = {D. Enskog},
     title = {Zur {Begr\"undung} der {Theorie} der {Fredholmschen} {Integralgleichungen}},
     journal = {Mathematische Zeitschrift},
     pages = {299--304},
     year = {1926},
     volume = {25},
     zbl = {52.0386.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1926__25_167882/}
}