1. G.J.F. Barbero, J. Salas, E.J.S. Villasenõr, Bivariate generating functions for a class of linear recurrences: general structure. J. Combin. Theory Ser. A 125, 146–165 (2014)
2. H. Belbachir, I.E. Bousbaa, Associated Lah numbers and $$r$$ r -Stirling numbers. arXiv:1404.5573v2 (2014)
3. L. Carlitz, Note on the numbers of Jordan and Ward. Duke Math. J. 38, 783–790 (1971)
4. L. Comtet, Advanced Combinatorics (D. Reidel Publishing Company, Dordrecht, 1977)
5. R.L. Graham, D.E. Knuth, O. Patashnik, Concrete Mathematics: A Foundation for Computer Science, 2nd edn. (Addison-Wesley, Boston, 1994)