M. P. Y. Lam, E. Lau, S. Siu, D. C. M. Ng, R. P. W. Kong, P. C. N. Chiu, W. S. B. Yeung, C. Lo, and I. K. Chu. Online combination of reversed-phase/reversed-phase and porous graphitic carbon liquid chromatography for multicomponent separation of proteomics and glycoproteomics samples. Electrophoresis, volume 32, issue 21, pages 2930—2940, November 2011. M. P. Y. Lam, S. Siu, E. Lau, X. Mao, H. Sun, P. C. N. Chiu, W. S. B. Yeung, D. M. Cox, and I. K. Chu. Online coupling of reverse-phase and hydrophilic interaction liquid chromatography for protein and glycoprotein characterization. Analytical and bioanalytical chemistry, volume 398, issue 2, pages 791—804, September 2010. S. Siu, M. P. Y. Lam, E. Lau, W. S. B. Yeung, D. M. Cox, and I. K. Chu. N-linked glycoprotein analysis using dual-extraction ultrahigh-performance liquid chromatography and electrospray tandem mass spectrometry. Methods in molecular biology (Clifton, N.J.), volume 600, pages 133—143, September 2009.