1. Yu. G. Rudoi, Yu. A. Tserkovnikov, “Single-particle Green's function in an anisotropic Heisenberg model. III. Spectrum and damping for anisotropy of the easy plane type”, Theoret. and Math. Phys., 19:2 (1974), 491–503  mathnet  crossref
  2. Yu. G. Rudoi, Yu. A. Tserkovnikov, “Single-particle Green's function in the anisotropic Heisenberg model II. Allowance for higher correlation functions”, Theoret. and Math. Phys., 15:3 (1973), 600–613  mathnet  crossref
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