1. Method of symmetrical coordinates applied to the solution of polyphase networks;Fortescue;Trans. Am. IEE,1918
2. Analysis of unbalanced polyphase networks by the method of phase coordinates. Part I: System representation in phase frame of reference;Laughton,1968
3. Analysis of unbalanced polyphase networks by the method of phase coordinates. Part 2: Fault analysis;Laughton;IEEE Trans. Power Appar. & Syst.,1966
4. Circulating currents in parallel untransposed multicitcuit lines. Part 2: Methods for estimating current unbalance;Hesse;IEEE Trans. Power Appar. & Syst.,1966
5. The effect of out-of-balance of transmission line impedances on the design of a 500 kV transmission network;Smith,1966