@article{10_2298_PIM141227016A,
     author = {Mohammed Abu Ayyash and Emanuele Rodaro},
     title = {Context-Freeness of the {Languages} of {Sch\"utzenberger} {Automata} of {HNN-Extensions} of {Finite} {Inverse} {Semigroups}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {177 },
     publisher = {mathdoc},
     volume = {_N_S_99},
     number = {113},
     year = {2016},
     doi = {10.2298/PIM141227016A},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM141227016A/}
}