New Basic Form of the Semiclassical Quantization Condition
  A certain modification of the semiclassical quantization condition based on the summarization of the known power expansion in the squared Planck constant is proposed. Corresponding deviation from exact spectra arises only together with the deviation of the studied potential from the supersymmetric one so that on the base of the presented method a new kind of the perturbation theory not connected with the Planck constant may be developed 
N.N.Trunov