Multiserver queue with addressed retrials. - Vilena V. Mushko; Machuveettil Joseph Jacob; K. O. Ramakrishnan; Achyutha Krishnamoorthy; Alexander N. Dudin (Ann. Oper. Res., 2006)

Distance matrices for conjugate skew gain graphs. - K. Shahul Hameed; K. O. Ramakrishnan; K. Biju (Discret. Math. Algorithms Appl., 2025)