@article{MV_1967_19_3_a16,
     author = {B. Marti\'c},
     title = {On an incomparability relation},
     journal = {Matemati\v{c}ki vesnik},
     pages = {304 },
     year = {1967},
     volume = {19},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/MV_1967_19_3_a16/}
}