[1] Khidr, A.M. and El-Desouky, B.S. (1984) A Symmetric Sum Involving the Stirling Numbers of the First Kind. European Journal of Combinatorics, 5, 51-54.
http://dx.doi.org/10.1016/S0195-6698(84)80018-9
[2] Comtet, L. (1972) Nombres de Stirling generaux et fonctions symetriques. Comptes Rendus de l’Académie des Sciences Paris (Series A), 275, 747-750.
[3] Comtet, L. (1974) Advanced Combinatorics: The Art of Finite and Infinite Expansions. D. Reidel Publishing Company, Dordrecht, Holand.
[4] El-Desouky, B.S. (1994) Multiparameter Non-Central Stirling Numbers. The Fibonacci Quarterly, 32, 218-225.
[5] El-Desouky, B.S. and Cakic, N.P. (2011) Generalized Higher Order Stirling Numbers. Mathematical and Computer Modelling, 54, 2848-2857.
http://dx.doi.org/10.1016/j.mcm.2011.07.005
[6] Cakic, N.P., El-Desouky, B.S. and Milovanovic, G.V. (2013) Explicit Formulas and Combinatorial Identities for Generalized Stirling Numbers. Mediterranean Journal of Mathematics, 10, 57-72.
http://dx.doi.org/10.1007/s00009-011-0169-x