Zhang F, Vierock J, Yizhar O, et al. The microbial opsin family of optogenetic tools. Cell. 2011;147(7):1446-57. doi:10.1016/j.cell.2011.12.004
Kokel D, Dunn TW, Ahrens MB, et al. Identification of nonvisual photomotor response cells in the vertebrate hindbrain. J Neurosci. 2013;33(9):3834-43. doi:10.1523/JNEUROSCI.3689-12.2013