1. On the Lambert W function;Corless;Adv. Comput. Math.,1996
2. J. Dixmier, J.-L. Nicolas, Partitions without small parts, in: Number theory, I (Budapest, 1987), Colloq. Math. Soc. János Bolyai, vol. 51, North-Holland, Amsterdam, 1990, pp. 9–33.
3. On some Problems of J. DÉnes and P. Turán, Studies in Pure Mathematics;Erdős,1983
4. Analytic Combinatorics;Flajolet,2009
5. An asymptotic formula for the Bell numbers;Moser;Trans. Roy. Soc. Canada,1955