1. Influence of water depth on the alteration processes of cinerites in the sedimentary basin-importance of Pedogenesis;Bouroz,1985
2. Essai de synthése des données acquises sur la genèse et l'evolution des marqueurs pétrographiques dans les bassins houillers. Review of the formation and evolution of petrographic markers in coal basins;Bouroz;Soc. Géol. Nord Mem. 16,1983
3. Kohlentonsteine in Kohlenrevieren der Erde. Erkenntnisstand 1983;Burger,1985
4. Discovery and preliminary studies of Illite-Tonsteins in Late Permian coal-bearing Formations of SW-China;Burger,1987
5. Carboniferous-Permian tonsteins of volcanic origin in North China;Feng,1987