1. Method of symmetrical coordinates applied to the solution of polyphase networks;Fortescue;Trans. Am. Inst. Electr. Eng.,1918
2. Determination of Voltages and Currents During Unbalanced Faults;Clarke;Gen. Electr. Rev.,1937
3. Problems Solved by Modified Symmetrical Components;Clarke;Gen. Electr. Rev.,1938
4. Relations Among Transformations Used in Electrical Engineering Problems;Concordia;Gen. Electr. Rev.,1938
5. Two-phase co-ordinates of a three-phase circuit;Kimbark;Electr. Eng.,1939