\Bibitem{AkhNig81} \by N.~Kh.~Akhmadeev, R.~I.~Nigmatulin \paper Modeling of spalling rupture under shock deformation. Analysis of an instantaneous spalling scheme \jour Prikl. Mekh. Tekh. Fiz. \yr 1981 \vol 22 \issue 3 \pages 120--128 \mathnet{http://mi.mathnet.ru/pmtf6002} \transl \jour J. Appl. Mech. Tech. Phys. \yr 1981 \vol 22 \issue 3 \pages 394--400 \crossref{https://doi.org/10.1007/BF00907568}