Knowledge Based Schematization of Route Directions. - Samvith Srinivas; Stephen C. Hirtle (Spatial Cognition, 2006)

Enriching Spatial Knowledge through a Multiattribute Locational System. - Stephen C. Hirtle; Samvith Srinivas (Spatial Cognition, 2010)

This is the tricky part: When directions become difficult. - Stephen C. Hirtle; Kai-Florian Richter; Samvith Srinivas; Robert Firth (J. Spatial Inf. Sci., 2010)