@article{MV_1964_16_3_a8,
     author = {R. Smiljani\'c},
     title = {A geometric interpretation of the third order e-systems},
     journal = {Matemati\v{c}ki vesnik},
     pages = {232 },
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1964},
     url = {http://geodesic.mathdoc.fr/item/MV_1964_16_3_a8/}
}