1. Epicyclic gear efficiencies;MacMillan;The Engineer,1949
2. Power flow and loss in differential mechanisms;MacMillan;Journal of Mechanical Engineering Science,1961
3. A simplified approach for determining power losses and efficiencies of planetary gear drives;Razimovsky;Machine Design,1956
4. Efficiency and speed ratio formulas for planetary gear systems;Glover;Product Engineering,1965
5. Epicyclic Drive Trains: Analysis, Synthesis and Applications;Müller,1982