1. Autofluorescence of fossil pollen and spores with special reference to age determination and coalification;Gijzel;Leidse Geol. Meded.,1967
2. Polychromatic UV-fluorescence microphotometrie of fresh and fossil plant substances, with special reference to the location and identification of dispersed organic material in rocks;Gijzel,1975
3. Applications of the geomicrophotometry of kerogen, solid hydrocarbons and crude oils to petroleum exploration;Gijzel,1981
4. Spektralfluorometrische Analysen von Sediment-Extrakten;Hagemann;Erdoel Kohle,1980
5. Spectral fluorometric analysis of extracts, a new method for the determination of the degree of maturity of organic matter in sedimentary rocks;Hagemann;Bull. Cent. Rech. Explor. Prod. Elf-Aquitaine,1981