Sabitov (1995). Sabitov, I. Kh. [in Russian] (1995), "On the problem of the invariance of the volume of a deformable polyhedron", Rossiĭskaya Akademiya Nauk. Moskovskoe Matematicheskoe Obshchestvo. Uspekhi Matematicheskikh Nauk, 50 (2): 223–224, ISSN0042-1316, MR1339277
Sabitov (1995). Sabitov, I. Kh. [in Russian] (1995), "On the problem of the invariance of the volume of a deformable polyhedron", Rossiĭskaya Akademiya Nauk. Moskovskoe Matematicheskoe Obshchestvo. Uspekhi Matematicheskikh Nauk, 50 (2): 223–224, ISSN0042-1316, MR1339277
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Sabitov (1995). Sabitov, I. Kh. [in Russian] (1995), "On the problem of the invariance of the volume of a deformable polyhedron", Rossiĭskaya Akademiya Nauk. Moskovskoe Matematicheskoe Obshchestvo. Uspekhi Matematicheskikh Nauk, 50 (2): 223–224, ISSN0042-1316, MR1339277