J.E. Dusatko \emph{et al.}, "Upgrade Development Progress for the CERN SPS High Bandwidth Transverse Feedback Demonstrator System", in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper WEPD25, pp. 700–702, ISBN: 978-3-95450-141-0, \url{http://jacow.org/IBIC2014/papers/wepd25.pdf}, 2014.