@article{NSJOM_1987_17_1a_21,
     author = {Acketa Dragan M.},
     title = {A construction of all the 

 non-isomorphic non-simple matroids on 9 elements},
     journal = {Novi Sad Journal of Mathematics},
     pages = {269-290},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1987_17_1a_21/}
}