Plocková, J., Matulík, F., Chmelík, J. Field programming in gravitational field-flow fractionation: a tool for fast and efficient separation of particles. In: Coupled, Hyphenated and Multidimensional Liquid Chromatographic Procedures for Separation of Macromolecules. 16th International Bratislava Meeting on Polymers. Bratislava: Polymer Institute of the Slovak Academy of Sciences, 2001, s. 68.