Da Silva, A. , Widmer, K.L., et al.: Varicose veins and chronic insufficiency . Vasa3: 118, 1974.
2.
Högensgard, I.G., Stürup, H.: Static and dynamic pressures in superficial and deep veins of the lower extremities in man. Acta Physiol. Scand., 27: 49-67, 1953.
3.
Arnoldi, C.C. : Venous pressure in the leg of healthy human subjects at rest and during muscular exercise in the nearly erect position . Acta Chur Scand., 130: 570-583, 1965.
4.
Arnoldi, C.C. , Linderholm, H.: Intracalcalcamean pressure in various forms of dysfunction of the venous pump of the calf. Acta Chir. Scand., 137: 21-27, 1971.
5.
Zelikovski, A., Podlipski, A., et al.: Changes in chemical, hematological and blood gas values in chronic venous insufficiency of the lower limbs. Vasa, Band 6, Heft. 1, 1977.
6.
Sigg, K.: Varizen, Ulcus Cruris and Thrombose. Berlin, Heidelberg, New York, Springer-Verlag , 1976.
7.
Höjensgard, I.C., Stürup, H.: Venous pressure in primary and postthrombotic varicose veins. Acta Chir. Scand., 99: 133-153, 1949.
8.
Van der Heyde, M.N.: Phlebography and venous pressure determination . Thesis, Leiden, 1960.
Davis, C.: Textbook of Surgery. Tenth edition. Edited by D. C. Sabiston, Jr.Philadelphia- London-Toronto, W. B. Saunders , 1972, pp. 1600-1622.
11.
Bjordal, R.: Venous pressure and perforator incompetence of the calf. Progres cliniques et therapeutiques dans le domaine de la phlebologie. Rapport du IIIme congrès internationale de phlebologie, Amsterdam, September 9-13, 1968. Edited by H. R. can der Molen, J. van Limborgh, W. Boersma. Apeldoorn Pays-Bas, Edition Stenvert and Zoon, 1970.
12.
Pollack, A.A. , Taylor, B.E., Myers, T.T., et al.: The effect of exercise and body position on the venous pressure at the angle in patients having venous valvular defect. J. Clin. Invest., 28: 559, 1949.
13.
Bassi, G.: Le varici degli arti inferiori. EdizioniMinerva Medica, Torino, 1962.