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Original Russian Text © M. S. Eryashkin, S. M. Skryabin, 2009, published in Matematicheskie Zametki, 2009, Vol. 86, No. 6, pp. 942–946.
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Eryashkin, M.S., Skryabin, S.M. The largest Hopf subalgebra of a bialgebra. Math Notes 86, 887–891 (2009). https://doi.org/10.1134/S0001434609110327
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DOI: https://doi.org/10.1134/S0001434609110327