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2. Alipiev O (2011) Geometric design of involute spur gear drives with symmetric and asymmetric teeth using the realized potential method. Department of Theory of Mechanisms and Machines vol 46. University of Ruse, Bulgaria, p 32
3. Kapelevich AL, Shekhtman YV (2003) Direct gear design: bending stress minimization. September/October 2003 Gear Technology
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5. Kapelevich AL, Shekhtman YV. Rating of asymmetric tooth gears. American Gear Manufacturers Association, Alexandria