The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
M. Chung and H. Qin, “Analysis of Envelope Perturbations in High-Intensity Beams Using Generalized Courant-Snyder Formulation”, presented at the 61\textsuperscript{st} ICFA ABDW on High-Intensity and High-Brightness Hadron Beams (HB'18), Daejeon, Korea, June 2018, paper MOP2WB05, unpublished.