1. On nonlinear effects in fracture mechanics
2. J. Eftis and H. Liebowitz, On fracture toughness evaluation for semi-brittle fracture. To appear in Engng Fracture Mech..
3. Development of the nonlinear energy method for determination of fracture toughness values;Liebowitz,1974
4. Theoretical and experimental comparisons of the nonlinear energy method to the T-integral, R-curve and C.O.D. method in fracture toughness testing;Liebowitz,1974
5. D. L. Jones, P. K. Poulose, J. Eftis and H. Liebowitz, An investigation of nonlinear fracture toughness in aluminum alloys under plane stress conditions.