CINGOLANI, E [Research on benzopyrones; ultraviolet spectra of 3-methylcoumarin and 4-methylcoumarin]. [electronic resource] - Rendiconti - Istituto superiore di sanita 1955 - 536-54 p. digital Publication Type: Journal Article ISSN: 0370-5811 Subjects--Topical Terms: Coumarins--analogs & derivativesResearch