1. Jinek, M. et al. Science 337, 816–821 (2012).
2. Jinek, M. et al. US Patent Application No. PCT/US2013/032589 (2013).
3. Cong, L. et al. Science 339, 819–823 (2013).
4. Zhang, F. US Patent No. 8,697,359 (2014).
5. Miller, J.C., Rebar, E.J. & Zhang, S.H. US Patent Application No. 2014/0336133 (2014).