Bound energy for the exponential-cosine-screened Coulomb potential
  An alternative approximation scheme has been used in solving the Schrodinger equation for the exponential-cosine-screened Coulomb potential. The bound state energ\i es for various eigenstates and the corresponding wave functions are obtained analytically up to the second perturbation term. 
Sameer M. Ikhdair and Ramazan Sever