@misc{indiciae5bce272d8430,
  title = {Palaeontology: pterosaur egg with a leathery shell.},
  author = {Qiang Ji and Shu-An Ji and Yen-Nien Cheng and Hai-Lu You and Jun-Chang Lü and Yong-Qing Liu and Chong-Xi Yuan},
  year = {2004},
  doi = {10.1038/432572a},
  url = {https://pubmed.ncbi.nlm.nih.gov/15577900/},
  note = {Source identifier: 15577900}
}