Caponio, E., M. A. Javaloyes, and A. Masiello. “Multiple Connecting Geodesics of a Randers-Kropina Metric via Homotopy Theory for Solutions of an Affine Control System”. Topological Methods in Nonlinear Analysis, vol. 61, no. 1, Feb. 2023, pp. 527-4, doi:10.12775/TMNA.2022.066.