N.M. Cook, C. Hall, S.D. Webb, R.A. Kishek, A. Valishev, A.L. Romanov and D.L. Bruhwiler, “Higher order perturbations to nonlinear integrable optics in IOTA,” presented at the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (Malmö, July 2016).