S. Racca: A viscosity-driven crack evolution Adv. Calc. Var. Vol. 5, p. 433-483, 2012 S. Racca: A model for crack growth with branching and kinking (Accepted Paper) 2012 S. Racca, R. Toader: A variational model for the quasi-static growth of fractional dimensional brittle fractures (Preprint) 2013 S. Racca: Some models of crack growth in brittle materials (Phd Thesis) 2013