1. Puissance Reactive en Courants Non Sinusoidaux;Lienard;Rev. Gen. de I' Electr.,1921
2. Definition et Mesure de la Puissance et de l' Energie Reactive (Communication presented to the “Day of Discussions” on Dec. 1924 to the French Society of Electricians);Iliovici;Bull. Soc. Franc, des Electr.,1925
3. New Aspects of Power Factor Improvement, Part I - Theoretical Basis;Erlicki;IEEE Trans. on Ind. Appl.,1968
4. New Aspects of Power Factor Improvement, Part II - Practical Circuits;Emanuel;IEEE Trans. on Ind. Appl.,1968
5. Energetical Factors in Power Systems with Nonlinear Loads;Emanuel;Arch. f. Elektrotech.,1977