1. Variations in the content and distribution of high molecular weight hydrocarbons in a series of coal macerais of different ranks;Allan,1977
2. Pétrographie du kérogène;Alpern,1980
3. The Black Sea sterol—A molecular fossil for dinofiagellate blooms;Boon;Nature, Lond.,1979
4. The potential of organic geochemical compounds as sedimentary indicators of upwelling;Brassell,1983