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3. G. V. Galatenko, "A generalization of the Dagdeil crack model," Prikl. Mekh.,25, No. 3, 53?58 (1989).
4. G. V. Galatenko, "Elastoplastic failure of an isotropic plate with a crack under biaxial loading," Prikl. Mekh.,25, No. 7, 86?91 (1989).
5. V. V. Panasyuk, Maximum Equilibrium of Brittle Bodies with Cracks [in Russian], Naukova Dumka, Kiev (1968).