@ARTICLE{
author={Stevic Stevo,Ahmed Ahmed El-Sayed,Kosmala Witold,Smarda Zdenek},
year={2021},
title={Note on a difference equation and some of its relatives},
journal={MATHEMATICAL METHODS IN THE APPLIED SCIENCES},
volume={44},
number={13},
pages={10053-10061},
document_type={Article},
} 

@ARTICLE{
author={Ahmed Ahmed El-Sayed,Iricanin Bratislav D,Kosmala Witold,Stevic Stevo,Smarda Zdenek},
year={2021},
title={Note on constructing a family of solvable sine-type difference equations},
journal={ADVANCES IN DIFFERENCE EQUATIONS},
volume={2021},
number={1},
pages={-},
document_type={Article},
}