1. Quaadgras, J.H., M.S. Thesis, University of Technology, Eindhoven, January,1964.
2. Multidimensionality, Hyphenation and Coupled-Column Techniques, special issue ofJ. Chromatogr. A 1995,500, p. 1–2.
3. Huber, J.F.K.; Hulsman, J.A.R.J.Anal. Chim. Acta 1967,38, 305; ibid.1967,38 581.
4. Huber, J.F.K.Ber. Bunsenges. Phys. Chem.,1973,77, 159.
5. Huber, J.F.K.J. Chromatogr. Sci.,1969,7, 172.