7[7]J.M.Nahman,V.B.Djordjevic. Nonuniformity Correction Factors for Maximum Mesh-and Step-Voltages of Ground Grids and Combined Ground Electrodes. IEEE Trans.on Power Delivery,1995,10(3)
8[8]L.Huang,X.Chen.Study of Unequally Spaced Grounding Grids.IEEE Trans.on Power Delivery,1995,10(2)
9Chow Y L,Elsherbiny M M,Salama M M A.Resistance Formulas of Grounding Systems in Two-layer Earth[].IEEE Transactions on Power Delivery.1996
10DAWALIBI F,MUKHEDKAR D.Influence of grounding rods on grounding grids[].IEEE Trans on Power Aparatus and Systems.1979