Beyond factual to formulated silhouettes. - John C. Whelan (2001)

Formulated Silhouettes for Sketching Terrain. - John C. Whelan; Mahes Visvalingam (TPCG, 2003)

Perceptually-Oriented Interest Management In Large-Scale Networked Virtual Environments. - Ian Dunwell; John C. Whelan (TPCG, 2005)

Spotlight Interest Management for Distributed Virtual Environments. - Ian Dunwell; John C. Whelan (IPT/EGVE, 2008)