@article{10_4064_aa_20_2_189_201,
     author = {Edward Spence},
     title = {Matrix divisors of {mI}},
     journal = {Acta Arithmetica},
     pages = {189--201},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1972},
     doi = {10.4064/aa-20-2-189-201},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-20-2-189-201/}
}