Comparison of methods for extracting the instantaneous phase of a biological system from time seriesA. N. Hramkov, A. S. Karavaev, Y. M. Ishbulatov, M. D. Prokhorov and V. I. PonomarenkoEur. Phys. J. Spec. Top., 234 15 (2025) 3907-3914DOI: https://doi.org/10.1140/epjs/s11734-025-01588-x