Busman, M Identification of phosphorylation sites in phosphopeptides by positive and negative mode electrospray ionization-tandem mass spectrometry. [electronic resource] - Journal of the American Society for Mass Spectrometry Mar 1996 - 243-9 p. digital Publication Type: Journal Article ISSN: 1044-0305 Standard No.: 10.1016/1044-0305(95)00675-3 doi