Amiri , Seyyed Majid Jafarian and Rostami , Hojjat. (2018). On Finite Groups Whose Nilpotentisers Are Nilpotent Subgroups.
            <i>Journal of Mathematical Study</i>. <i>50</i> (4).
            307-313.
         doi:10.4208/jms.v50n4.17.01