Operator Formulation of q-Deformed Dual String Model
  We present an operator formulation of the q-deformed dual string model amplitude using an infinite set of q-harmonic oscillators. The formalism attains the crossing symmetry and factorization and allows to express the general n-point function as a factorized product of vertices and propagators. 
M. Chaichian, J.F. Gomes and P. Kulish