TY - JOUR AU - Houghton, GR AU - Ackroyd, CE DO - doi:10.1302/0301-620X.61B2.438267 UR - https://doi.org/10.1302/0301-620X.61B2.438267 TI - Sleeve fractures of the patella in children: a report of three cases T2 - The Journal of Bone & Joint Surgery British Volume VL - 61-B IS - 2 PY - 1979 SP - 165 EP - 168 ER -