Sci-Hub | Liquid Chromatography/Mass Spectrometry of Carotenoids Using Atmospheric Pressure Chemical Ionization. Journal of Mass Spectrometry, 31(9), 975–981 | 10.1002/(sici)1096-9888(199609)31:9<975::aid-jms380>3.0.co;2-s

Van Breemen, R. B., Huang, C.-R., Tan, Y., Sander, L. C., & Schilling, A. B. (1996). Liquid Chromatography/Mass Spectrometry of Carotenoids Using Atmospheric Pressure Chemical Ionization. Journal of Mass Spectrometry, 31(9), 975–981. doi:10.1002/(sici)1096-9888(199609)31:9<975::aid-jms380>3.0.co;2-s

10.1002/(sici)1096-9888(199609)31:9<975::aid-jms380>3.0.co;2-s