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"Determination of amino acids by ion-pair liquid chromatography with post-column derivatization using 1,2-naphthoquinone-4-sulfonate". Journal of Chromatography A676 (2): 311–9. 1994. doi:10.1016/0021-9673(94)80431-1. பப்மெட்:7921184.
"Fluorometric determination of guanidino compounds by new postcolumn derivatization system using reversed-phase ion-pair high-performance liquid chromatography". Anal. Biochem.160 (2): 392–8. 1987. doi:10.1016/0003-2697(87)90066-2. பப்மெட்:3578768.