@article{doi:10.1302/0301-620X.77B3.7744939,
author = {Papp, T and Porter, RW and Aspden, RM},
title = {Trefoil configuration and developmental stenosis of the lumbar vertebral canal},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {77-B},
number = {3},
pages = {469-472},
year = {1995},
doi = {10.1302/0301-620X.77B3.7744939},
url = {https://doi.org/10.1302/0301-620X.77B3.7744939}
}