@article{doi:10.1302/0301-620X.96B6.34040,
author = {Duncan, C. P. and Haddad, F. S.},
title = {The Unified Classification System (UCS): improving
our understanding of 
periprosthetic fractures},
journal = {The Bone & Joint Journal},
volume = {96-B},
number = {6},
pages = {713-716},
year = {2014},
doi = {10.1302/0301-620X.96B6.34040},
url = {https://doi.org/10.1302/0301-620X.96B6.34040}
}