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Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 15–25, March–April, 1991.
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Alekseeva, T.E., Martynyuk, P.A. Crack emergence trajectories at a free surface. Soviet Mining Science 27, 90–99 (1991). https://doi.org/10.1007/BF02500926
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DOI: https://doi.org/10.1007/BF02500926