The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
K.P. Wootton, "Direct Observation of Ultralow Vertical Emittance Using a Vertical Undulator", in Proc. 4th International Beam Instrumentation Conference, Melbourne, Australia, September 2015, paper TUCLA01, pp. 278-282, ISBN: 978-3-95450-176-2, doi:10.18429/JACoW-IBIC2015-TUCLA01, http://accelconf.web.cern.ch/AccelConf/IBIC2015/papers/tucla01.pdf, 2016.