Jeż, Artur; Okhotin, Alexander Equations over sets of integers with addition only. (English) Zbl 1342.68185 J. Comput. Syst. Sci. 82, No. 6, 1007-1019 (2016). MSC: 68Q45 03D05 PDFBibTeX XMLCite \textit{A. Jeż} and \textit{A. Okhotin}, J. Comput. Syst. Sci. 82, No. 6, 1007--1019 (2016; Zbl 1342.68185) Full Text: DOI
Nakamura, Katsuhiko Languages not recognizable in real time by one-dimensional cellular automata. (English) Zbl 1152.68034 J. Comput. Syst. Sci. 74, No. 7, 1095-1102 (2008). MSC: 68Q80 68Q45 PDFBibTeX XMLCite \textit{K. Nakamura}, J. Comput. Syst. Sci. 74, No. 7, 1095--1102 (2008; Zbl 1152.68034) Full Text: DOI
Albert, J.; Culik, Karel II Tree correspondence problems. (English) Zbl 0478.68089 J. Comput. Syst. Sci. 24, 167-179 (1982). MSC: 68T99 68R10 03D35 PDFBibTeX XMLCite \textit{J. Albert} and \textit{K. Culik II}, J. Comput. Syst. Sci. 24, 167--179 (1982; Zbl 0478.68089) Full Text: DOI