@article{NSJOM_1993_23_2a_25,
     author = {Acketa Dragan M.},
     title = {On rank 2 greedoids},
     journal = {Novi Sad Journal of Mathematics},
     pages = {289-303},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1993},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1993_23_2a_25/}
}