Winsor, T. and Hyman, C.: Objective venous studies (Insufficiency, obstruction and inflammation). J. Cardiov. Surg., 2: 146, 1961.
2.
Sakaguchi, S. et al.: Functional segmental plethysmography. A new venous function test (preliminary report). J. Cardiov. Surg., 9: 87, 1968.
3.
DeCamp, P.T. et al.: Ambulatory venous pressure determinations in postphlebitic and related syndromes. Surgery, 29: 44, 1941.
4.
Warren, R. et al.: Venous pressure in the saphenous system in normal, varicose and postphlebitic extremities. Surgery, 26: 435, 1949.
5.
Arnoldi, C.C. : The venous return from the lower leg in health and in chronic venous insufficiency. Acta Orthop. Scand., Suppl., 64: 1964.
6.
DeWeese, J.A. and Rogoff, S.M.: Functional ascending phlebography of the lower extremities by serial long film technique, evaluation of anatomic and functional detail in 62 extremities. Am. J. Roentg., 81: 841, 1959.
7.
DeWeese, J.A. and Rogoff, S.M.: Phlebographic patterns of acute deep venous thrombosis of the leg. Surgery, 53: 99, 1963.
8.
Schumacher, H.B. et al.: Functional venography of the lower extremities . S. G. O., 98: 257, 1954.
9.
Cooper, F.W. et al.: The study of peripheral vascular disease with radioactive isotopes . S.G.O., 88: 711, 1949.
10.
Gilje, O. and Sommerfelt, S.C. : Investigation of the venous flow in varicose veins and postthrombotic legs by injection of a radioactive substance. Acta Chir. Scand., 125: 437, 1963.
11.
Dohn, K.: Investigation of the venous system of the lower-extremities during activity . J. Bone & Joint Surg., 34-B, 528, 1952.
12.
MacKay, I.F.S. and McCarthy, G.: Measurement of venous valvular competency in the legs. J. Appl. Phisiol., 12: 329, 1958.
13.
Ludbrook, J.The musculovenous pump of the human lower limb . Am. Heart J., 71: 635, 1966.
14.
Luke, J.C.The deep vein valves, A venographic study in normal and postphlebitic states . Surgery, 29: 381, 1951.
15.
Mahorner, H. : Treatment of venous thrombosis and its sequelae . Arch. Surg., 85: 355, 1962.
Linton, R.R. : The postthrombotic ulceration of the lower extremity, its etiology and surgical treatment. Ann. Surg. , 138: 415, 1953.
18.
Lockhart, H.E. : A study of the deep veins with special reference to retrograde venography. Brit. J. Surg., 38: 284, 1951.
19.
Scott, W.J.M. : Postphlebitic and varicose venous stasis, Clinical results of treatment by pulsatile air pressure principle. J. A. M. A., 147: 1195, 1951.
20.
Bertelsen, S. and Gammelgard, A.: Surgical treatment of postthrombotic leg ulcers. J. Cardiov. Surg., 6: 452, 1965.
21.
Cockett, F.B. : The significance of absence of valves in the deep veins. J. Cardiov. Surg., 5: 722, 1964.