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N.L. Bobrov, V.N. Chernobay, Yu.G. Naidyuk, L.V. Tyutrina, I.K. Yanson, D.G. Naugle, and K.D.D. Rathnayaka, Observation of anisotropic effect of antiferromagnetic ordering on the superconducting gap in ErNi2B2C, Low Temp. Phys. 36, (2010) [Fiz. Nizk. Temp. 36, 1228-1243, (2010)] DOI: https://doi.org/10.1063/1.3521569.