1. T. Giamarchi, Quantum Physics in One Dimension (Calendon, Oxford, 2003).
2. V. N. Prigodin and Yu. A. Firsov, Zh. Éksp. Teor. Fiz. 76(2), 736 (1979) [Sov. Phys. JETP 49 (2), 369 (1979)]; Zh. Éksp. Teor. Fiz. 76 (5), 1602 (1979) [Sov. Phys. JETP 49 (5), 813 (1979)].
3. Yu. A. Firsov, V. N. Prigodin, and Chr. Seidel, Phys. Rep. 126, 245 (1985).
4. S. A. Brazovskiĭ and V. M. Yakovenko, Zh. Éksp. Teor. Fiz. 89(6), 2318 (1985) [Sov. Phys. JETP 62 (6), 1340 (1985)].
5. H. J. Schulz, Int. J. Mod. Phys. B 5, 57 (1991).