@article{doi:10.1302/0301-620X.59B4.925059,
author = {Blackburne, JS and Velikas, EP},
title = {Spondylolisthesis in children and adolescents},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {59-B},
number = {4},
pages = {490-494},
year = {1977},
doi = {10.1302/0301-620X.59B4.925059},
url = {https://doi.org/10.1302/0301-620X.59B4.925059}
}