1. I. Y. Borg and H. C. Heard, Contr. Mineral. and Petrol. 23 (1969) 128.
2. Idem, ?Experimental and Natural Rock Deformation? (Springer Verlag, Berlin, 1970) p. 375.
3. G. W. Lorimer, P. E. Champness and E. T. C. Spooner, Nature P239 (1972) 108.
4. G. W. Lorimer, H. Nissen and P. E. Champness, Schweiz. Mineral. Petrog. Mitt 54 (1974) 707.
5. S. White, Contr. Mineral. and Petrol. 50 (1975) 289.