Grigory I. Leviev, Menachem I. Tsindlekht, Edouard B. Sonin, and Israel Felner, The electromagnetic response of a superconducting ferromagnets, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 844-848, (2007)] DOI: https://doi.org/10.1063/1.2746834.