Can Lévy noise induce coherence and stochastic resonances in a birhythmic van der Pol system? Raoul Mbakob Yonkeu, René Yamapi, Giovanni Filatrella and Jürgen Kurths Eur. Phys. J. B, 93 8 (2020) 144 Published online: 03 August 2020 DOI: 10.1140/epjb/e2020-10146-x