Miguel Méndez, Adolfo Rodríguez. A Combinatorial Model for $q$-Generalized Stirling and Bell Numbers.
20th Annual International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2008), 2008, Viña del Mar, Chile. pp.557-570,
⟨10.46298/dmtcs.3607⟩.
⟨hal-01185141⟩