@misc{indiciaeb659ac9e12da,
  title = {Rotational invariance in light-cone quantization.},
  author = {M Burkardt and A Langnau},
  year = {1991},
  doi = {10.1103/physrevd.44.3857},
  url = {https://pubmed.ncbi.nlm.nih.gov/10013858/},
  note = {Source identifier: 10013858}
}