S. Takeno, S. Homma, “Classical Spin Systems, Nonlinear Evolution Equations and Nonlinear Excitations”, Progress of Theoretical Physics, 64:4 (1980), 1193
Sophocles J. Orfanidis, “SU(n) Heisenberg spin chain”, Physics Letters A, 75:4 (1980), 304
Eugen Magyari, “Magnetic solitons as envelope solitons in a large class of the nonlinear Schrödinger equations”, Physics Letters A, 80:2-3 (1980), 168
Shozo Takeno, “Nonlinear Excitations and Coherent States in the Ising Model in a Transverse Field”, J. Phys. Soc. Jpn., 48:4 (1980), 1075
H C Fogedby, “Solitons and magnons in the classical Heisenberg chain”, J. Phys. A: Math. Gen., 13:4 (1980), 1467
Shigeo Homma, Shozo Takeno, “Dynamics and Statistical Mechanics of the Classical Ising Model in a Transverse Field”, J. Phys. Soc. Jpn., 49:5 (1980), 1671
А. С. Будагов, “Вполне интегрируемая модель классмеской теории поля с нетривиальным взаимодействием частиц в двумерном пространстве-времени”, Зап. научн. сем. ПОМИ, 77 (1978), 24–56 ; A. S. Budagov, “Completely integrable model of classical field theory with nontrivial particle interaction in two-dimensional space-time”, J. Soviet Math., 22:5 (1983), 1550–1573