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Tsarbopoulos A, Pramanik BN, Nagabhushan TL, Covey TR. Structural analysis of the CHO‐derived interleukin‐4 by liquid‐chromatography/electrospray ionization mass spectrometry. Journal of Mass Spectrometry. 1995;30(12):1752-1763.

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Karas M, Bahr U, Strupat K, Hillenkamp F, Tsarbopoulos A, Pramanik BN. Matrix dependence of metastable fragmentation of glycoproteins in MALDI TOF mass spectrometry. Analytical Chemistry. 1995;67(3):675-679.