1. Bergeron, N.: The structure of the universal exponential solution of the Yang-Baxter equation, Math. Res. Lett. 1 (1994), 99–105.
2. Fomin, S.: Duality of graded graphs, J. Algebraic Combin. 3 (1994), 357–404.
3. Fomin, S. and Kirillov, A. N.: The Yang-Baxter equation, symmetric functions, and Schubert polynomials, Proc. 5th Internat. Conf. on Formal Power Series and Algebraic Combinatorics, Firenze, 1993, 215–229; to appear in Discrete Math.
4. Fomin, S. and Kirillov, A. N.: Grothendieck polynomials and the Yang-Baxter equation, Proc. 6th Internat. Conf. Formal Power Series and Algebraic Combinatorics, DIMACS, 1994, pp. 183–190.
5. Fomin, S. and Kirillov, A. N.: Combinatorial B n-analogues of Schubert polynomials, to appear in Trans. Amer. Math. Soc.