Multi-Hamiltonian formulations and stability of higher-derivative extensions of 3d Chern–Simons V. A. Abakumova, D. S. Kaparulin and S. L. Lyakhovich Eur. Phys. J. C, 78 2 (2018) 115 Published online: 08 February 2018 DOI: 10.1140/epjc/s10052-018-5601-y