1. Theory of Stress Distribution in Insulation of High Voltage D.C. Cables”, Part II;Eoll;IEEE Trans. Electr. Insul.,1975
2. J.O. Boström A. Campus U. Nilsson P. Carstensen A. Gustafsson A. Farkas K. Johannesson th 1999
3. B. Aladenize R. Coelho J.C. Assier H. Janah P. Mirebeau 1999
4. Electric Fields in HVDC Paper-insulated Cables.;Jeroense;IEEE Trans. Dielectr. Electr. Insul.,1998
5. Some of the Considerations for Materials Operating under High-Voltage, Direct-Current Stresses.;Hampton.;IEEE Electr. Insul. Mag.,2008