@misc{indiciae7831a984aadc,
  title = {Nonlinear sigma model for string solitons.},
  author = {M Natsuume},
  year = {1993},
  doi = {10.1103/physrevd.48.835},
  url = {https://pubmed.ncbi.nlm.nih.gov/10016312/},
  note = {Source identifier: 10016312}
}