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Fürst Z, Búzás B, Friedmann T, Schmidhammer H, Borsodi A (May 1993). "Highly potent novel opioid receptor agonist in the 14-alkoxymetopon series". European Journal of Pharmacology. 236 (2): 209–15. doi:10.1016/0014-2999(93)90591-5. PMID8391457.
