1. D. Halas, “The shape of migrating voids,” J. Nuc. Mater., 23, 118–20 (1968).
2. F. Nichols, “Pore migration in ceramic fuel elements,” ibid., 27, 137–146 (1968).
3. R. Sens, “The kinetics of pore movement in UO2 fuel rods,” ibid., 43, 293–307 (1972).
4. F. Nichols, “On the thermal gradient migration of lenticular voids,” ibid., 84, 319–326 (1979).
5. S. Gill, “Pore migration under high temperature and stress gradients,” Intern. J. Heat and Mass Transfer, 52, 1123–1131 (2009).