Treewidth of Circular-Arc Graphs (Abstract). - Ravi Sundaram; Karan Sher Singh; C. Pandu Rangan (WADS, 1991)

Optimal Path Cover Problem on Block Graphs and Bipartite Permutation Graphs. - R. Srikant 001; Ravi Sundaram; Karan Sher Singh; C. Pandu Rangan (Theor. Comput. Sci., 1993)

Treewidth of Circular-Arc Graphs. - Ravi Sundaram; Karan Sher Singh; C. Pandu Rangan (SIAM J. Discret. Math., 1994)