1. F. Brown, \itshape Depth-graded motivic multiple zeta values, arXiv:1301.3053ver1, 2013.
2. D. Ma and K. Tasaka, \itshape Relationship between multiple zeta values of depths 2 and 3 and period polynomials, arXiv:1707.08178ver2,.
3. Double zeta values and modular forms;Gangl, Herbert,2006
4. Some arithmetic aspects of Galois actions in the pro-𝑝 fundamental group of ℙ¹-{0,1,∞};Ihara, Yasutaka,2002
5. Double zeta values, double Eisenstein series, and modular forms of level 2;Kaneko, Masanobu;Math. Ann.,2013