@article{doi:10.1302/0301-620X.64B3.7096402,
author = {Porter, RW and Park, W},
title = {Unilateral spondylolysis},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {64-B},
number = {3},
pages = {344-348},
year = {1982},
doi = {10.1302/0301-620X.64B3.7096402},
url = {https://doi.org/10.1302/0301-620X.64B3.7096402}
}