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Antimicrobial activity of extracts of the lichen Xanthoparmelia pokomyi and its gyrophoric and stenosporic acid constituents. Candan Mehmet, Yilmaz Meral, Tay Thrgay, Kivanc Merih and Türk Hayrettin, Zeitschrift für Naturforschung. C. A journal of biosciences, 2006, vol. 61, no5-6, pp. 319-323, INIST:17912298