KAWANO, C A method for extraction and determination of 2,4-dinitro phenylhydrazones of keto acids. [electronic resource] - Analytical biochemistry May 1962 - 361-8 p. digital Publication Type: Journal Article ISSN: 0003-2697 Standard No.: 10.1016/0003-2697(62)90064-7 doi Subjects--Topical Terms: HydrazonesKeto Acids--chemistryPhenylhydrazines--analogs & derivatives