1. Study of crack closure under constant amplitude loading for 6063-T6 Al-alloy;Kumar;Int. J. Pres. Ves. & Piping,1988
2. Effect of variable amplitude loading in fatigue crack propagation patterns;Hudson;NASA Technical Notes D-1803,1963
3. Effect of changing amplitude on the rate of fatigue crack propagation in two Al-alloys;Hudson;NASA, TND-960,1961
4. An exploratory study of delay in fatigue crack growth;Joans;Int. J. Fract. Mech.,1971
5. Fatigue crack growth under variable amplitude loading;Schijve,1974