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Bykov, D. (2018): Sigma Models with Complex, Graded and eta-Deformed Target Spaces. In: Physics of Particles and Nuclei, Vol. 49, No. 5: pp. 963-965
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I describe a class of two-dimensional sigma-models with complex homogeneous target spaces, whose equations of motion admit zero-curvature representations. I point out the relation to models with Z(m)-graded target spaces and to the so-called eta-deformed models.