@article{PIM_1977_N_S_21_35_a22,
     author = {\v{Z}arko Mijajlovi\'c},
     title = {A {Note} {On} {Elementary} {And} {Extension}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {141 },
     publisher = {mathdoc},
     volume = {_N_S_21},
     number = {35},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_21_35_a22/}
}