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A.L. Solovjov, V.N. Svetlov, V.B. Stepanov, S.L. Sidorov, V.Yu. Tarenkov, A.I. D’yachenko, and A.B. Agafonov, Possibility of local pair existence in optimally doped SmFeAsO1-х in pseudogap regime, Low Temp. Phys. 37, (2011) [Fiz. Nizk. Temp. 37, 703-797, (2011)] DOI: https://doi.org/10.1063/1.3630135.