Pighizzini, Giovanni, and Cezar Campeanu, editors. Descriptional Complexity of Formal Systems: 19th IFIP WG 1.02 International Conference, DCFS 2017, Milano, Italy, July 3-5, 2017, Proceedings. Springer International Publishing, 2017, https://doi.org/10.1007/978-3-319-60252-3.