1. The microstructure and toughness of high tensile strength steels;Ohtani;Trans ISIJ,1972
2. The cleavage strength of polycrystals;Petch;J Iron Steel Inst Jpn,1953
3. Strengthening steel by austenite grain refinement;Grange;Trans ASM,1966
4. Quantitative stereology;Underwood,1970
5. Metallography: principles and practice;Vander Voort,1984