5Pittler MH,Ernst E. Horse-chestnut seed extract for chronic venous insufficiency: a criteria based systematic review. Arch Dermatol,1998,134(11):1 356-1 360.
6Diehm C,Trampiseh HJ, Lange S, et al. Comparison of leg compression stocking and oral horse chestnut seed extra therapy in patients with chronic venous insufficiency. Lancet, 1996, 347 (8997) :292-294.