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Original Russian Text © V.O. Manturov, O.V. Manturov, 2010, published in Doklady Akademii Nauk, 2010, Vol. 434, No. 1, pp. 25–28.
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Manturov, V.O., Manturov, O.V. Free knots and groups. Dokl. Math. 82, 697–700 (2010). https://doi.org/10.1134/S1064562410050054
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DOI: https://doi.org/10.1134/S1064562410050054