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Translated from Matematicheskie Zametki, Vol. 53, No. 5, pp. 155–157, May, 1993.
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Kozhegel'dinov, S.S. A problem on Theonian triangles (TT). Math Notes 53, 558–560 (1993). https://doi.org/10.1007/BF01208554
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DOI: https://doi.org/10.1007/BF01208554