@article{PIM_1977_N_S_21_35_a16,
     author = {{\DJ}uro Kurepa},
     title = {On {Some} {Hypotheses} {Concerning} {Trees}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {99 },
     publisher = {mathdoc},
     volume = {_N_S_21},
     number = {35},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_21_35_a16/}
}