1. Markoff graphs;Abe,2015
2. Geometry and Markoff’s spectrum for Q(i), I;Abe;Trans. Amer. Math. Soc.,2013
3. Two-color Markoff graph and minimal forms;Abe;Int. J. Number Theory,2016
4. R. Abe, B. Rittaud, Dedekind sums and Markoff minimal forms, preprint, 2017.
5. R. Abe, B. Rittaud, Quasi-palindromy of elements of SL(2,Z) associated to the Markoff spectrum, in: Proceedings of the 6th International Conference on Words, 2007, pp. 7–17.