@article{GAMA_1968_1968_1_a12,
     author = {Bollman, D. and  Ram{\'\i}rez-L\'opez, H.},
     title = {Matrices nilpotentes sobre {Zm.}},
     journal = {Gaceta matem\'atica},
     pages = {205-208},
     publisher = {mathdoc},
     volume = {20},
     number = {7-8},
     year = {1968},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1968_1968_1_a12/}
}