@article{10_1017_S0008439500032057,
     author = {Rund, H.},
     title = {Variationsrechnung, by {L.} {Koschmieder.} {Sammiung} {Goschen,} {Band} 1075. {Walter} de {Gruyter} and {Co.,} {Berlin,} 1962.},
     journal = {Canadian mathematical bulletin},
     pages = {495--495},
     year = {1964},
     volume = {7},
     number = {3},
     doi = {10.1017/S0008439500032057},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500032057/}
}