Mariya Bessonov, Alexey Ovchinnikov, Maxwell Shapiro. Integrability conditions for parameterized linear difference equations. In Michael B. Monagan, Gene Cooperman, Mark Giesbrecht, editors, International Symposium on Symbolic and Algebraic Computation, ISSAC'13, Boston, MA, USA, June 26-29, 2013. pages 45-52, ACM, 2013. [doi]