@article{doi:10.1302/0301-620X.77B4.7615597,
author = {Harper, GD and Bull, T and Cobb, AG and Bentley, G},
title = {Failure of the Ring polyethylene uncemented acetabular cup},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {77-B},
number = {4},
pages = {557-561},
year = {1995},
doi = {10.1302/0301-620X.77B4.7615597},
url = {https://doi.org/10.1302/0301-620X.77B4.7615597}
}