@article{MAN_1906__62_158262,
     author = {D Egorow},
     title = {Die hinreichenden {Bedingungen} des {Extremums} in der {Theorie} des {Mayerschen} {Problems.} {(Mit} 3 {Figuren} im {Text)}},
     journal = {Mathematische Annalen},
     pages = {371--380},
     publisher = {mathdoc},
     volume = {62},
     year = {1906},
     zbl = {37.0391.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1906__62_158262/}
}