TY - JOUR AU - Bishay, M DO - doi:10.1302/0301-620X.73B2.2005169 UR - https://doi.org/10.1302/0301-620X.73B2.2005169 TI - Sleeve fracture of upper pole of patella T2 - The Journal of Bone & Joint Surgery British Volume VL - 73-B IS - 2 PY - 1991 SP - 339 EP - 339 ER -