1. A. Goncharov, J. Amer. Math. Soc. 18 (1), 1 (2005).
2. A. Goncharov, Adv. Math. 114 (2), 197 (1995).
3. D. Zagier, in Frontiers in Number Theory, Physics, and Geometry. II (Springer, Berlin, 2007), pp. 3–65.
4. D. Rudenko, Compos. Math. 157 (14), 649 (2021).
5. A. A. Suslin, Izv. Math. 15 (3), 589 (1980).