Description of octupole degrees of freedom in the U(5) ↔ SO(13) transitional region A. Jalili Majarshin, M. A. Jafarizadeh and H. Sabri Eur. Phys. J. Plus, 132 10 (2017) 418 Published online: 12 October 2017 DOI: 10.1140/epjp/i2017-11664-8