M. Nashaat, Yu.M. Shukrinov, A. Irie, A.Y. Ellithi, and Th.M. El Sherbini, Microwave induced tunable subharmonic steps in superconductor–ferromagnet–superconductor Josephson junction, Low Temp. Phys. 45, (2019) [Fiz. Nizk. Temp. 45, 1473-1479, (2019)] DOI: https://doi.org/10.1063/10.0000203.