1. Specification of the direction of regard;Alpern,1962
2. Memory representation in natural tasks;Ballard;Journal of Cognitive Neuroscience,1995
3. Eye and head movements in freely moving rabbits;Collewijn;Journal of Physiology, London,1977
4. Binocular gaze control under free-head conditions;Collewijn,1992
5. The effect of freeing the head on eye movement characteristics during 3-D shifts of gaze and tracking;Collewijn,1992