1. F.C. Frank:Phil. Mag., 1951, vol. 42, pp. 809–19.
2. K. V. Vladimirskiy:Zh. Eksper. Teor. Fiz., 1947, vol. 17, p. 530.
3. F.C. Frank and J. H. van der Merwe:Proc. Roy. Soc. A, 1949, vol. 198, pp. 205–25.
4. F. Kroupa:Czech. J. Phys., 1959, vol. B9, pp. 488–94.
5. J. W. Christian and A. G. Crocker:Dislocations in Solids, F. R. N. Nabarro, ed., North-Holland, Amsterdam, 1980, vol. 3, pp. 165–250.