@article{PIM_1978_N_S_23_37_a17,
     author = {Svetozar Mili\'c},
     title = {A {Proof} {And} {An} {Extension} {Of} {A} {Theorem} {Of} {G.} {Birkoff}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {137 },
     publisher = {mathdoc},
     volume = {_N_S_23},
     number = {37},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/PIM_1978_N_S_23_37_a17/}
}