1. Growth of voids in metals during diffusion and creep
2. D. McLean, "Vacancies and Other Point Defects in Metals and Alloys", p. 187. 1957: London (Inst. Metals).
3. A. H. Cottrell, "Structural Processes in Creep" (Special Rep. No. 70), p. 1. 1961: London (Iron Steel Inst.).