New Simulation Technologies for Surgical Training and Certificiation: Current Status and Future Projections. - Gerald A. Higgins; Gregory L. Merrill; Lawrence J. Hettinger; Christoph Kaufmann; Howard R. Champion; Richard M. Satava (Presence Teleoperators Virtual Environ., 1997)

Teleos: Development of a Software Toolkit for Authoring Virtual Medical Environments. - Gerald A. Higgins; Dwight A. Meglan; Rakesh Raju; Jonathan R. Merril; Gregory L. Merrill (Presence Teleoperators Virtual Environ., 1997)