@misc{indiciaeec0f27343ae7,
  title = {String vertex on the Grassmann manifold.},
  author = {S Saito},
  year = {1988},
  doi = {10.1103/physrevd.37.990},
  url = {https://pubmed.ncbi.nlm.nih.gov/9958768/},
  note = {Source identifier: 9958768}
}