1. AIEE Committee Report (1960). Soil thermal characteristics in relation to underground cables. AIEE Trans., Part III, V. PAS-79.
2. Mitchell, J.K., T.C. Kao, and O.N. Abdel-Hadi (1977). Backfill materials for underground power cables, phase 1. EPRI RP 7841–1. Thermal Resistivity Measurement Methods, Backfill Treatments, Heat and Moisture Flow Analysis.
3. Newall, J.W. (1977). Long Reach submarine cable thermal resistivity tests. Ontario Hydro Research Division Report No 77–42-K.