1. H. Schardin, Velocity Effects in Fracture, in Fracture (edited by B. L. Averbach et al.) Technology Press of Massachusetts Institute of Technology and John Wiley & Sons, Inc., New York (1959) 297–330.
2. A. B. J. Clark, G. R. Irwin, Experimental Mechanics, 6 (1966) 321.
3. F. Kerkhof, Bruchvorgänge in Gläsern, Verlag der Deutschen Glastechnischen Gesellschaft, Frankfurt am Main (1970).
4. H. Andersson, J. Mech. Phys. Solids, 17 (1969) 405.
5. H. Andersson, J. Mech. Phys. Solids, 18 (1970) 437.