M. M. Nassar, H. Eleuch, M. Abdel-Aty & A.-S. F. Obada. (2019). Entropy Squeezing of a Three-Level Atom Interacting with a Cavity Field.
            <i>Journal of Atomic and Molecular Sciences</i>. <i>1</i> (1).
            54-61.
         doi:10.4208/jams.031309.042309a