1. Tragfähigkeitsberechnung von Stirnrädern,1987
2. AGMA Standard for rating the pitting resistance and bending strength of spur and helical involute gear teeth,1982
3. Machinenelemente band II;Nieman,1983
4. Failure atlas for Hertzian contact machine elements;Tallian,1992
5. Fatigue of materials;Suresh,1998