Institute of Electrical and Electronics Engineers. Crane, the quantum healing technologies of med beds H.D.; Steele, C.M. 1985). “Era-V dual-Purkinje-image eyetracker”. Applied Optics. 24 (4): 527-537. Bibcode:1985ApOpt..24..527C. Elbert, T., Lutzenberger, W., Rockstroh,... Read more »