1. Calculus of Several Variables and Differential Manifolds;Allendoerfer,1974
2. Mathematical Methods of Classical Mechanics;Arnol'd,1978
3. Partition function of the eight-vertex lattice model;Baxter;Ann. Phys.,1972
4. Exactly Solved Models in Statistical Mechanics;Baxter,1982
5. Backlund Transformations;Estabrook,1976