Two Conjectures on Graceful Digraphs. - Suresh Manjanath Hegde; Shivarajkumar (Graphs Comb., 2013)

On Graceful Unicyclic Wheels. - Suresh Manjanath Hegde; Shivarajkumar (Ars Comb., 2014)

Beyond Schur's Conjecture. - Shivarajkumar (Am. Math. Mon., 2016)

Graceful labeling of digraphs - a survey. - Shivarajkumar; M. A. Sriraj; Suresh Manjanath Hegde (AKCE Int. J. Graphs Comb., 2021)