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Ignatov, Y.D., Kovalenko, V.S., Andreev, B.V. et al. Effect of Leu- and Met-enkephalins on brain reinforcing systems. Bull Exp Biol Med 92, 893–895 (1981). https://doi.org/10.1007/BF00836990
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DOI: https://doi.org/10.1007/BF00836990