L. Doolittle et al., "THE LCLS-II LLRF SYSTEM" IPAC 2015, Richmond, USA.C. Hovater, L. Doolittle, "The LCLS-II LLRF System," in Proceeding of IPAC2015, Richmond, VA, USA, 2015.C. Hovater and L. Doolittle, "The LCLS-II LLRF system", in Proc. IPAC'15, Richmond, VA, USA, ...