The integer solutions of matrix linear unilateral and bilateral equations over quadratic rings von N. B. Ladzoryshyn

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The standard form of matrices over quadratic rings with respect to (z,k) -equivalence and structure of solutions of matrix bilateral linear equations von N. B. Ladzoryshyn, V. M. Petrychkovych

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The standard form of matrices over the ring of Gaussian integers with respect to (z, k)-equivalence von V. M. Petrychkovych, H. V. Zelisko, N. B. Ladzoryshyn

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