1. Andrzej SCHINZEL, Maciej ZAKARCZEMNY, On a linear homogeneous congruence.

Math. 106, (2006) pp. 283–292

2. Maciej ZAKARCZEMNY, Number of solutions in a box of a linear homogeneous equation in an Abelian group.

Acta Arith. 155, (2012) pp. 227 – 231.

3. Maciej ZAKARCZEMNY, Number of solutions in a box of a linear. Colloq. Math., online first.