@article{Grytczuk:2009,
author
=
"A.Grytczuk and I.Kurzydło",
title
=
"The necessary and sufficient condition for the solvability of the diophantine matrix equation Amx + Amy + Amz = Amw",
journal
=
"Boletin de la Sociedad Matemática Mexicana",
volume
=
"Vol. 15",
number
=
"no 2",
pages
=
"109--115",
year
=
"2009",
}