A class of nonlinear coherent states attached to Tsallis q-exponential Abdelhak Bendjeffal, Abdallah Smida, Juba Messamah and Mahmoud Hachemane Eur. Phys. J. Plus, 134 7 (2019) 330 Published online: 15 July 2019 DOI: 10.1140/epjp/i2019-12865-9