1. Arthritis in children;Wilkinson;Radiol Clin North Am,1988
2. A radiographic standard of reference for the growing knee;Pyle,1969
3. Radiographic atlas of skeletal development of the foot and ankle;Hoerr,1962
4. Radiographic atlas of skeletal development of the hand and wrist;Greulich,1959
5. Radiologic classification of knee joint destruction in juvenile chronic arthritis;Pettersson;Pediatr Radiol,1984