Grzegorz Madejski. Infinite Hierarchy of Permutation Languages. Fundamenta Informaticae, 130(3):263-274, 2014. [doi]
@article{Madejski14, title = {Infinite Hierarchy of Permutation Languages}, author = {Grzegorz Madejski}, year = {2014}, doi = {10.3233/FI-2014-992}, url = {http://dx.doi.org/10.3233/FI-2014-992}, researchr = {https://researchr.org/publication/Madejski14}, cites = {0}, citedby = {0}, journal = {Fundamenta Informaticae}, volume = {130}, number = {3}, pages = {263-274}, }