@article{MZM_1967_2_2_a2,
     author = {Yu. A. Drozd and V. M. Turchin},
     title = {The number of modules of representations in genus for integral matrix rings of the second order},
     journal = {Matemati\v{c}eskie zametki},
     pages = {133--138},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_2_a2/}
}