@article{doi:10.1302/0301-620X.61B1.33996,
author = {Hall, DJ and Harrison, MH and Burwell, RG},
title = {Congenital abnormalities and Perthes' disease. Clinical evidence that children with Perthes' disease may have a major congenital defect},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {61-B},
number = {1},
pages = {18-25},
year = {1979},
doi = {10.1302/0301-620X.61B1.33996},
url = {https://doi.org/10.1302/0301-620X.61B1.33996}
}