S. A. Abramov, Manuel Bronstein, M. Petkovsek, Carsten Schneider,
"On Rational and Hypergeometric Solutions of Linear Ordinary Difference Equations in $\Pi\Sigma^*$-field extensions"
, in Journal of Symbolic Computation, Vol. 107, Seite(n) 23-66, 2021, ISSN: 1095-855X
Original Titel:
On Rational and Hypergeometric Solutions of Linear Ordinary Difference Equations in $\Pi\Sigma^*$-field extensions