1. Abramov, S.A., On Summation of Rational Functions, Zh. Vychisl. Mat. Mat. Fiz., 1971, vol. 11, pp. 1071–1075.
2. Abramov, S.A., Rational Solution Component of Linear First-order Recurrent Relation with Rational Right-hand Side, Zh. Vychisl. Mat. Mat. Fiz., 1975, vol. 15, pp. 1035–1039.
3. Abramov, S.A., Indefinite Sums of Rational Functions, Proc. of ISSAC′95, 1995, pp. 303–308.
4. Paule, P., Greatest Factorial Factorization and Symbolic Summation, J. Symbolic Computation, 1995, vol. 20, pp. 235–268.
5. Pirastu, R., Algorithms for Indefinite Summation of Rational Functions in Maple, The Maple Techn. Newsletter, 1995, vol. 2, no. 1, pp. 1–12.