1. “Effects of eddy currents in transformer winding,”;Dowell;Proceedings IEE,1966
2. “Effective resistance of alternating currents of multilayer windings,”;Bennett;Transactions of the American Institute of Electrical Engineers,1940
3. J. Jongsma “High-frequency ferrite power transformer and choke design, Part 3: transformer winding design, Part 4: improved method of power choke design,” 1986
4. “Experimental research on skin effect in conductors,”;Kennelly;Transactions AIEE,1915