Fleck, N.A.Smith, I.F.C.Smith, R.A.2007-08-142007-08-142007-08-14198310.1111/j.1460-2695.1983.tb00339.xhttps://infoscience.epfl.ch/handle/20.500.14299/10116Closure behaviour of surface crackstext::journal::journal article::research article