@misc{indiciae7c437f5766a1,
  title = {New partitioning perturbation theory. I},
  author = {Certain, P. R. and Hirschfelder, J. O.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700057885},
  note = {Source identifier: 19700057885}
}