1. Valentich J., Westinghouse Research Laboratories, Rep. No. TDS 66-8P6-EVMTL-M1.
2. Nomography and Empirical Equations;Davis,1955
3. Stress Concentration Design Factors;Peterson,1953
4. Designing Against Fatigues of Metals;Heywood,1962
5. Metal Fatigue;Sines,1959