1. Synchronous machines – part III;Doherty;AIEE Trans,1927
2. Two-reaction theory of synchronous machines – generalized method of analysis, part I;Park;AIEE Trans,1929
3. Two-reaction theory of synchronous machines – II;Park;AIEE Trans,1933
4. Synchronous machine damping and synchronizing torques;Concordia;AIEE Trans,1951
5. Synhronizing and damping torque coefficients of synchronous machines;Shepherd;AIEE Trans,1961