@misc{indiciaebb1e5420f492,
  title = {More on the two-dimensional O(4) sigma model.},
  author = {UM Heller},
  year = {1988},
  doi = {10.1103/physrevd.38.3834},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959153/},
  note = {Source identifier: 9959153}
}