@article{doi:10.1302/0301-620X.81B4.0810743b,
author = {BIRCHER, M. D.},
title = {Retroversion of the acetabulum},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {81-B},
number = {4},
pages = {743-743},
year = {1999},
doi = {10.1302/0301-620X.81B4.0810743b},
url = {https://doi.org/10.1302/0301-620X.81B4.0810743b}
}