| Beute, G.N., et al. “Case Study of the Use of the Easy Guide Neuro Image Guided Surgery Prototype System During Resection of a Pineal Region Meningioma”, Philips Medical Systems. |
| Northern Digital Inc. Brochure Entitled “NDI's Portable Optical Localizer”, published 1996. |
| “BrainLAB VectorVision” Brochure published by BrainLAB GmbH. |
| “Stealth Station Image Guided Surgery System” Brochure published by Sofamor Danek in 1996. |
| Medivison Advanced Support Systems Brochure Entitled “Reach your Target . . . ” published by Medivision in 1996. |
| Aesculap Brochure Entitled “SPOCS Surgical Planning and Orientation Computer System”. |
| Elekta Brochure Entitled “The Freehand Viewing Wand” published in Jun., 1996. |
| Philips Brochure Entitled “EasyGuide Neuro Image Guided Surgery System” published in 1995. |
| Zeiss Brochure Entitled “SMN Stereotactic System” published in 1996. |