Fractional Differential Calculus · Volume 7, Issue 2 Quasi-periodic solutions of fractional nabla difference systems 07-16 Pages 339-355 DOI 10.7153/fdc-2017-07-16 Downloads Short PDF Full PDF PNG Authors Jagan Mohan Jonnalagadda Keywords fractional order backward (nabla) difference fixed point existence uniqueness periodic Subject classes 34A08 39A23 39A99