Harju, T.; Kleijn, H. C. M. Cardinality problems of compositions of morphisms and inverse morphisms. (English) Zbl 0685.68065 Math. Syst. Theory 22, No. 3, 151-159 (1989). MSC: 68Q45 20F10 08A50 03D40 PDF BibTeX XML Cite \textit{T. Harju} and \textit{H. C. M. Kleijn}, Math. Syst. Theory 22, No. 3, 151--159 (1989; Zbl 0685.68065) Full Text: DOI
Karhumäki, Juhani; Kleijn, H. C. M. On the equivalence of compositions of morphisms and inverse morphisms on regular languages. (English) Zbl 0555.68023 Mathematical foundations of computer science, Proc. 11th Symp., Praha/Czech. 1984, Lect. Notes Comput. Sci. 176, 355-363 (1984). MSC: 68Q45 20M15 20M35 03D60 PDF BibTeX XML