Universal integrability objects
  We discuss the main points of the quantum group approach in the theory of quantum integrable systems and illustrate them for the case of the quantum group $U_q(\mathcal L(\mathfrak{sl}_2))$. We give a complete set of the functional relations correcting inexactitudes of the previous considerations. A special attention is given to the connection of the representations used to construct the universal transfer operators and $Q$-operators. 
H. Boos, F. G\"ohmann, A. Kl\"umper, Kh. S. Nirov, A. V. Razumov
math-ph math.MP