Influence of complex conductivity on rotary penetration drag of the surface plasmon polaritonsMuhammad Usman, Jehan Akbar, Atta ur Rahman, Rashid Khan and Saeed UllahEur. Phys. J. Plus, 137 12 (2022) 1342DOI: https://doi.org/10.1140/epjp/s13360-022-03576-9