1. E. V. Allen (1955 ) Peripheral Vascular Diseases , 2nd ed. , p.405 . Philadelphia: W. B. Saunders Company.
2. T. Barka, and P. J. Anderson (1963 ) Histochemistry: Theory, Practice and Bibliography . p.244 -245 . New York: Harper & Row. Publishers, Inc.
3. W. B. Bean (1959 ) Vascular Spiders and Related Lesions of the Skin , p.45 -50 . Springfield, Ill.: Charles C Thomas.
4. Venous Lakes