21th International Conference on Descriptional Complexity of Formal Systems (DCFS), Jul 2019, Košice, Slovakia. pp.285-297, ⟨10.1007/978-3-030-23247-4_22⟩
20th International Conference on Descriptional Complexity of Formal Systems (DCFS), Jul 2018, Halifax, NS, Canada. pp.237-249, ⟨10.1007/978-3-319-94631-3_20⟩