@article{PIM_1982_N_S_31_45_a14,
     author = {{\DJ}uro Kurepa},
     title = {Around {The} {Nuber} {Of} {Chains} {In} {Partitive} {Sets}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {109 },
     year = {1982},
     volume = {_N_S_31},
     number = {45},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a14/}
}