V.M. Pan, O.A. Kalenyuk, O.L. Kasatkin, V.A. Komashko, O.M. Ivanyuta, and G.A. Melkov, Microwave response of single crystal YBa₂Cu₃O_7-d films as a probe for pairing symmetry: Experimental Methods and Applications, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 651-660, (2006)] DOI: https://doi.org/10.1063/1.2199453.