@article{doi:10.1302/0301-620X.55B1.20,
author = {Crellin, R. Q. and Jones, E. R.},
title = {SACRAL EXTRADURAL CYSTS },
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {55-B},
number = {1},
pages = {20-31},
year = {1973},
doi = {10.1302/0301-620X.55B1.20},
url = {https://doi.org/10.1302/0301-620X.55B1.20}
}