Nonlinear coherent states of the para-Bose oscillator and their non-classical features B. Mojaveri, A. Dehghani and R. Jafarzadeh Bahrbeig Eur. Phys. J. Plus, 133 12 (2018) 529 Published online: 19 December 2018 DOI: 10.1140/epjp/i2018-12351-0