| Http://: https://www.ncbi.nlm.nih.gov/books/NBK536947/ |
| Http://: https://www.hopkinsmedicine.org/health/conditions-and-diseases/chondroblastoma |
| Http://: https://www.ncbi.nlm.nih.gov/books/NBK536947/ |
| Http://: https://www.hopkinsmedicine.org/health/conditions-and-diseases/chondroblastoma |