Geodesic
About the number of primitive non-associated second order matrices of determinant $n$ divisible by a given matrix
Vladikavkazskij matematičeskij žurnal, Tome 17 (2015) no. 2, pp. 62-67 
U. M. Pachev. About the number of primitive non-associated second order matrices of determinant $n$ divisible by a given matrix. Vladikavkazskij matematičeskij žurnal, Tome 17 (2015) no. 2, pp. 62-67. http://geodesic.mathdoc.fr/item/VMJ_2015_17_2_a8/
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Voir la notice de l'article provenant de la source Math-Net.Ru

We obtained formulae for the number of primitive non-associated second order matrices of given odd determinant, as well as for the number of such matrices divisible on the right (left) by the given matrix used in questions of representability of integers by indefinite ternary quadratic forms.

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