@misc{indiciae0b605100484f,
  title = {Astronomy. A supernova riddle.},
  author = {Douglas C Leonard},
  year = {2007},
  doi = {10.1126/science.1123373},
  url = {https://pubmed.ncbi.nlm.nih.gov/17218513/},
  note = {Source identifier: 17218513}
}