@article{NSJOM_1978_8_Nonea_12,
     author = {Acketa Dragan M.},
     title = {On the enumeration of matroids of rank 2},
     journal = {Novi Sad Journal of Mathematics},
     pages = {83-90},
     publisher = {mathdoc},
     volume = {8},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1978_8_Nonea_12/}
}