Clifford, P. C., Gazzard, V., Lawrance, R. J., Clyne, C. A., & Webster, J. H. (1986). Below knee femoropopliteal bypass in severe ischaemia: Results using EXS Dacron and human umbilical vein. Royal College of Surgeons of England.

Clifford, P. C., V. Gazzard, R. J. Lawrance, C. A. Clyne, e J. H. Webster. Below Knee Femoropopliteal Bypass in Severe Ischaemia: Results Using EXS Dacron and Human Umbilical Vein. Royal College of Surgeons of England, 1986.

Clifford, P. C., et al. Below Knee Femoropopliteal Bypass in Severe Ischaemia: Results Using EXS Dacron and Human Umbilical Vein. Royal College of Surgeons of England, 1986.