1. Reinhardt, H.F, Horstmann, G.A., Gratz, O.: Sonic Stereometry in Microsurgical Procedures for Deep-Seated Brain Tumours and Vascular Malformations. Neurosurgery 32 (1993) 51–57
2. Adams, L., Gilsbach, Krybus, W., Meyer-Ebrecht, D., Mösges, R.M, Schlöndorff, G.: CAS - A Navigation Aid for Surgery. 3D Imaging in Medicine. NATO ASI series.
3. Colchester, A.C.F., Zhao, J., Henri, C., Evans, R.J., Roberts, P, Maitland, N., Hawkes, D.J., Hill, D.L.G., Strong, A.J., Thomas, D.G.T., Gleeson, M.J., Cox, T.C.S.: Craniotomy Simulation and Guidance Using a Stereo Video Based Tracking System. Vis. Biomed. Comp., Robb, R.A., SPIE 2359 (1994) 541–564.
4. Weintraub, D.J., Ensing, M.: Human Factors in Head-Up Display Design: The Book of HUD University of Michigan, May 1992
5. Steinhaus, H.: Sur la Localisation au Moyen des Rayons X. Comptes Rendus de L’Academie des Science 206 (1938) 1473–5