Core inverse and core partial order of Hilbert space operators. - Dragan S. Rakic; Nebojsa C. Dincic; Dragan S. Djordjevic (Appl. Math. Comput., 2014)

Star, sharp, core and dual core partial order in rings with involution. - Dragan S. Rakic; Dragan S. Djordjevic (Appl. Math. Comput., 2015)