Demonstration of monogamy laws for Gaussian steering in optomechanics J. El Qars, M. Daoud, R. Ahl Laamara and N. Habiballah Eur. Phys. J. Plus, 135 1 (2020) 87 Published online: 17 January 2020 DOI: 10.1140/epjp/s13360-020-00120-5