1. Éléments de Mathématique, Algèbre Chapitres 1 à 3;Bourbaki,1970
2. Combinatorial Matrix Theory;Brualdi,1991
3. Critical pairs of matrices for the degree of the minimal polynomial of the Kronecker sum;Caldeira;Linear and Multilinear Algebra,1997
4. A pollard type result for restricted sums;Caldeira;J. Number Theory,1998
5. C. Caldeira, J.A. Dias da Silva, The invariant polynomials degrees of the Kronecker sum of two linear operators and additive theory (preprint)