Horton, B., Lenci, S., Pavlovskaia, E., Romeo, F., Rega, G., & Wiercigroch, M. (2026). Stability Boundaries of Period-1 Rotation for a Pendulum Under Combined Vertical and Horizontal Excitation. Journal of Applied Nonlinear Dynamics, 2(2), 103-126. https://doi.org/10.5890/JAND.2013.04.001