Blower, T., Pei, X., Short, F., Fineran, P., Humphreys, D., Luisi, B., & Salmond, G. (2011). A processed non-coding RNA regulates an altruistic bacterial antiviral system. Nature Structural and Molecular Biology, 18(2), 185-190. https://doi.org/10.1038/nsmb.1981