1. Littmann WE. The Mechanism of Contact Fatigue. NASA Spec Rep SP-237 n.d.
2. Propagation of contact fatigue from surface and subsurface origins;Littmann;J Basic Eng,1966
3. Lou B., Han L., Lu Z., Liu S., Shen F. The rolling contact fatigue behaviors in carburized and hardened steel. Fatigue 90 Proc. Fourth Int. Conf. Fatigue Fatigue Thresholds, 1990, p. 627–632.
4. Roller and ball bearings. (including appendixes and plates at back of volume);Goodman;Minutes Proc Inst Civ Eng,1912
5. Die lebensdauer von kugellagern (Durability of ball bearings);Palmgren;ZDVD,1924