Roucoux, A., Guitton, D., & Crommelinck, M. (1980). Stimulation of the Superior Colliculus in the Alert Cat .2. Eye and Head Movements Evoked When the Head Is Unrestrained. Experimental Brain Research, 39(1), 75-85. https://doi.org/10.1007/BF00237071 (Original work published 1980)