@article{PIM_1969_N_S_09_23_a25,
     author = {M. Marjanovi\'c},
     title = {An {Example} {Concerning} {The} {Category} {Numbers}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {181 },
     publisher = {mathdoc},
     volume = {_N_S_09},
     number = {23},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/PIM_1969_N_S_09_23_a25/}
}