1. Godunov, S.K. and Ryaben’kii, V.S., The Theory of Difference Schemes: An Introduction, North-Holland, Amsterdam, 1964.
2. Samarskii, A.A., Vvedenie v teoriyu raznostnykh skhem (Introduction to the Theory of Difference Schemes), Moscow: Nauka, 1971.
3. Bousquet-Melou, M. and Petkovsek, M., Linear recurrences with constant coefficients: the multivariate case, Discrete Math., 2000, vol. 225, nos. 1–3, pp. 51–75.
4. Stanley, R.P., Enumerative Combinatorics, vol. 1, Cambridge Univ. Press, Cambridge, 1996.
5. Stanley, R.P., Enumerative Combinatorics, vol. 2, Cambridge Univ. Press, Cambridge, 1999.