1. Schwalbe K-H, Zerbst U, Kim Y-J, Brocks W, Cornec A, Heerens J, Amstutz H. EFAM ETM 97: The ETM method for assessing the significance of crack-like defects in engineering structures. GKSS Research Centre, GKSS/98/E/6, Germany, 1997
2. R6: Assessment of the integrity of structures containing defects. Nuclear Electric Procedure R/H/R6, Revision 3, 1998
3. Schwalbe K-H, Kim Y-J, Hao S, Cornec A, Koçak M. EFAM ETM-MM 96: The ETM method for assessing the significance of crack-like defects in joints with mechanical heterogeneity (strength mis-match). GKSS Research Centre, GKSS/97/E/9, Germany, 1996
4. Appendix 16: Allowance for strength mis-match effects. In: R6
5. Ainsworth RA, Lei Y. Strength mis-match estimation scheme. In: Schwalbe K-H, Koçak M, editors. Mis-matching of interfaces and welds. Germany: GKSS Research Centre Publications; 1997. p. 35–54