Geodesic
On the invariant factors of sums of integral matrices
Portugaliae mathematica, Tome 46 (1989) no. 1, pp. 87-95.

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Keywords: sums of integral matrices, principal ideal domain, invariant factors, divisibility 
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     author = {Marques de S\'a, Eduardo},
     title = {On the invariant factors of sums of integral matrices},
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     pages = {87--95},
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     url = {http://geodesic.mathdoc.fr/item/PORMA_1989__46_1_115652/}
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Marques de Sá, Eduardo. On the invariant factors of sums of integral matrices. Portugaliae mathematica, Tome 46 (1989) no. 1, pp. 87-95. http://geodesic.mathdoc.fr/item/PORMA_1989__46_1_115652/