A.A. Barannik, V.V. Glamazdin, R. Prozorov, P.C. Canfield, V.N. Skresanov, S.A. Vitusevich, M.A. Tanatar, N. Ni, N.T. Cherpak, and and K.I. Torokhtii, Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe_0.926Co_0.074)₂As₂ single crystal, Low Temp. Phys. 37, (2011) [Fiz. Nizk. Temp. 37, 912-915, (2011)] DOI: https://doi.org/10.1063/1.3660321.