Simple Linear Time Recognition of Unit Interval Graphs. - Derek G. Corneil; Hiryoung Kim; Sridhar Natarajan; Stephan Olariu; Alan P. Sprague (Inf. Process. Lett., 1995)

Disjoint Paths in Circular Arc Graphs. - Sridhar Natarajan; Alan P. Sprague (Nord. J. Comput., 1996)