Induced Variational Method from Supersymmetric Quantum Mechanics and the   Screened Coulomb Potential
  The formalism of Supersymmetric Quantum Mechanics supplies a trial wave function to be used in the Variational Method. The screened Coulomb potential is analysed within this approach. Numerical and exact results for energy eigenvalues are compared. 
Elso Drigo Filho and Regina Maria Ricotta