@article{doi:10.1302/0301-620X.66B5.6501354,
author = {Sharp, DJ and Porter, KM and Duke, RF},
title = {The resolution of protrusio acetabuli treated with Ring's hip prosthesis},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {66-B},
number = {5},
pages = {635-638},
year = {1984},
doi = {10.1302/0301-620X.66B5.6501354},
url = {https://doi.org/10.1302/0301-620X.66B5.6501354}
}