1. On the summation of P-recursive sequences;Abramov,2006
2. D'Alembertian solutions of linear differential and difference equations;Abramov,1994
3. On the structure of multivariate hypergeometric terms;Abramov;Adv. Appl. Math.,2002
4. Gosper's algorithm, accurate summation, and the discrete Newton–Leibniz formula;Abramov,2005
5. Hadamard grade of power series;Allouche;J. Number Theory,2011