1. Deer, W.A., Howie, R.A., Zussman, J.: Rock Forming Minerals, Vol. I, p. 13. London: Longmans 1962
2. Jambor, J.L., Smith, C.H.: Mineral. Mag. 33, 730 (1964)
3. Abu-Eid, R.M., Langer, K.: in preparation
4. Stainless-steel gaskets 260 ?m thick with 250 ?m diameter hole
5. Piermarini, G.C., Block, S., Barnett, J.D.: J. Appl. Phys. 44, 5377 (1973)