S.S. Apostolov, Z.A. Maizelis, M.A. Sorokina, and V.A. Yampol’skii, Nonlinear wood anomalies in the reflectivity of layered superconductors, Low Temp. Phys. 36, (2010) [Fiz. Nizk. Temp. 36, 255-261, (2010)] DOI: https://doi.org/10.1063/1.3331418.