Asymmetric EPR steering in a cavity–magnon system generated by a squeezed vacuum field and an optical parametric amplifierAbdelkader Hidki, Noureddine Benrass, Abderrahim Lakhfif and Mostafa NassikEur. Phys. J. Plus, 139 12 (2024) 1100DOI: https://doi.org/10.1140/epjp/s13360-024-05907-4