1. Price: “Text Book of Medicine” Fourth Edition page800.
2. Severe Purpura with Gangrene of Lower Extremity following Scarlet Fever; Recovery after Amputation;Dick G. F.;The American Journal of Diseases of Children,1934
3. H. L.Tidy: “Treatment of Hemorrhagic Diseases” The British Medical Journal May 2 1936 page895.
4. Boyd: “Pathology of Internal Diseases” 1932 page411.
5. H. L.Tidy: “Treatment of Hemorrhagic Diseases” The British Medical Journal April 25 1936 page850.