1. Skilling,1965
2. Definition of an ideal synchronous machine and formula for armature flux linkages;Park;Gen. Electr. Rev.,1928
3. Transient theory of synchronous generators under unbalanced conditions;Ching;J. Inst. Electr. Eng.,1954
4. Method of symmetrical coordinates applied to the solution of polyphase networks;Fortescue;Trans. Am. Inst. Electr. Eng.,1918
5. General Theory of Electrical Machines;Adkins,1959