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nih.gov
pubmed.ncbi.nlm.nih.gov
Przybilla B, Georgii A, Bergner T, Ring J (1990). "Demonstration of quinolone phototoxicity in vitro". Dermatologica. 181 (2): 98–103. doi:10.1159/000247894. PMID2173670.
patents.google.com
US 3907808, Lescher Y, Carabateas PM, "1,4-Dihydro-4-oxo-7-pyridyl-3-quinolinecarboxylic acid derivatives", issued 23 September 1975, assigned to STWB Inc.; Chem. Abstr., 84, 43880p (1975).