Summation Formulas for the product of the q-Kummer Functions from   $E_q(2)$
  Using the representation of E_q(2) on the non-commutative space zz^*-qz^*z=\sigma; q<1, \sigma>0 summation formulas for the product of two, three and four q-Kummer functions are derived. 
H. Ahmedov and I. H. Duru