Lyndon, R. C.; Ullman, J. L. Pairs of real 2-by-2 matrices that generate free products. (English) Zbl 0159.30602 Mich. Math. J. 15, 161-166 (1968). PDFBibTeX XMLCite \textit{R. C. Lyndon} and \textit{J. L. Ullman}, Mich. Math. J. 15, 161--166 (1968; Zbl 0159.30602) Full Text: DOI
Lyndon, R. C.; Schützenberger, M. P. The equation \(a_ M=b^ Nc^ P\) in a free group. (English) Zbl 0106.02204 Mich. Math. J. 9, 289-298 (1962). PDFBibTeX XMLCite \textit{R. C. Lyndon} and \textit{M. P. Schützenberger}, Mich. Math. J. 9, 289--298 (1962; Zbl 0106.02204) Full Text: DOI
Lyndon, R. C. Relation algebras and projective geometries. (English) Zbl 0105.25303 Mich. Math. J. 8, 21-28 (1961). PDFBibTeX XMLCite \textit{R. C. Lyndon}, Mich. Math. J. 8, 21--28 (1961; Zbl 0105.25303) Full Text: DOI
Lyndon, R. C. The equation \(a^2b^2=c^2\) in free groups. (English) Zbl 0084.02803 Mich. Math. J. 6, 89-95 (1959). PDFBibTeX XMLCite \textit{R. C. Lyndon}, Mich. Math. J. 6, 89--95 (1959; Zbl 0084.02803) Full Text: DOI
Lyndon, R. C. A theorem of Friedrichs. (English) Zbl 0070.03005 Mich. Math. J. 3, 27-29 (1956). PDFBibTeX XMLCite \textit{R. C. Lyndon}, Mich. Math. J. 3, 27--29 (1956; Zbl 0070.03005) Full Text: DOI