1. Adamović, D., Milas, A.: On the triplet vertex algebra $$W(p)$$. Adv. Math. 217, 2664–2699 (2008)
2. Adamovic, D., Milas, A.: The structure of Zhu’s algebras for certain $$W$$-algebras. Adv. Math. 227, 2425–2456 (2011)
3. Barron, K., Vander Werf, N., Yang, J.: Higher level Zhu algebras and modules for vertex operator algebras. J. Pure Appl. Alg. 223, 3295–3317 (2019)
4. Barron, K., Vander Werf, N., Yang, J.: The level one Zhu algebra for the vertex operator algebra associated to the Virasoro algebra and implications. In: Krauel, M., Tuite, M., Yamskulna, G. (eds.) Vertex Operator Algebras, Number Theory, and Related Topics (To appear). Contemporary Mathematics. American Mathematical Society, Providence
5. Dong, C., Li, H., Mason, G.: Vertex operator algebras and associative algebras. J. Alg. 206, 67–98 (1998)