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Published in Matematicheskie Zametki, Vol. 50, No. 3, pp. 27–37, September, 1991.
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Dodson, C.T.J., Vazquez-Abal, M.E. Tangent and frame bundle harmonic lifts. Mathematical Notes of the Academy of Sciences of the USSR 50, 902–908 (1991). https://doi.org/10.1007/BF01156131
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DOI: https://doi.org/10.1007/BF01156131