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R. I. Khaimova-Mal'kova, Handbook of Method for Stress Studies by the Optical Method [in Russian], Izd. AN SSSR, Moscow (1963).
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 133–134, July–August, 1969.
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Alen'kin, Y.D. Relation between the stresses in a block of untouched ore and the width of the bottom of an open pit in combined working. Soviet Mining Science 5, 485–486 (1969). https://doi.org/10.1007/BF02501424
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DOI: https://doi.org/10.1007/BF02501424