@article{doi:10.1302/0301-620X.77B1.7822393,
author = {Steinberg, ME and Hayken, GD and Steinberg, DR},
title = {A quantitative system for staging avascular necrosis},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {77-B},
number = {1},
pages = {34-41},
year = {1995},
doi = {10.1302/0301-620X.77B1.7822393},
url = {https://doi.org/10.1302/0301-620X.77B1.7822393}
}