1. Fugimoto, W. T. and J. F. Gallagher (1977). Summary of landing gear initial flaws. Report AFFDL-TR-77–125 McDonnell Aircraft Company, St. Louis, Mo.
2. Fracture toughness of gray cast irons;Hornbogen;Internat. Cast Metals J.,1977
3. Abrasive Wear Resistance as a Materials Test;Rabinowicz;Lub. Eng.,1977
4. Examination of the relationship between the structure of martensite, the frequency of transformation microcracks and fracture toughness;Zeman;Kovove Materialy,1977
5. Influence of internal notches on abrasive wear (in German);Zum Gahr;Z. Metallkde,1978