The effectiveness of 0-(beta-hydroxyethyl)-rutosides in chronic venous insufficiency. A double-blind study into the influence of O-(beta-hydroxyethyl)-rutosides on the TcP02 and light reflection rheography in patients with chronic venous insufficiency (CVI) - Neumann, H A M; van den Broek, M J T B (Int Angiol (suppl), 1989)