@article{MAN_1921__84_158882,
     author = {A. Razmadz\'e},
     title = {\"Uber das {Fundamentallemma} der {Variationsrechnung}},
     journal = {Mathematische Annalen},
     pages = {115--116},
     year = {1921},
     volume = {84},
     zbl = {48.0589.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1921__84_158882/}
}