Soft triaxial rotor in the vicinity of γ = π/6 and its extensions L. Fortunato, S. De Baerdemacker and K. Heyde Eur. Phys. J. A, 25 3 (2005) 439-440 Published online: 18 April 2005 DOI: 10.1140/epjad/i2005-06-018-0