@misc{indiciae9c0f53164ab2,
  title = {Undetermined-constant method in the boson Green's-function theory.},
  author = {JB Zhang and ZK Qin},
  year = {1987},
  doi = {10.1103/physreva.36.915},
  url = {https://pubmed.ncbi.nlm.nih.gov/9898937/},
  note = {Source identifier: 9898937}
}