1. Harrison RB, Riddervold HO, Willett ED, Stamp WG (1980) Acromio-clavicular separation masked by muscle spasms. Virginia Medical Monthly 107:337
2. Keats TE, Lusted LB (1985) Atlas of roentgenographic measurements. Year Book Medical Publishers, Chicago
3. Pettrone FA, Nirschl RP (1978) Acromioclavicular dislocation. Am J Sports Med 6:160
4. Post M (1985) Current concepts in the diagnosis and management of acromioclavicular dislocations. Clin Orthop 200:234
5. Rockwood C, Green D (1977) Fractures. JB Lippincott, Philadelphia, p 721