@misc{indiciae44ba18069d15,
  title = {General approach to the envelope-function approximation based on a quadrature method.},
  author = {R Winkler and U Rössler},
  year = {1993},
  doi = {10.1103/physrevb.48.8918},
  url = {https://pubmed.ncbi.nlm.nih.gov/10007111/},
  note = {Source identifier: 10007111}
}