1. Prodromus of South Africa Megafloras, Devonian to Lower Cretaceous;Anderson,1985
2. A Devonian lycopod stem with well preserved cortical tissues;Andrews;Palaeontology,1971
3. Devonian Floras;Arber,1921
4. Correlación general de biozonas;Archangelsky,1986
5. Observations on fossil plants from the Devonian of eastern North America. III. Gilboaphyton goldringiae, gen. et sp. nov. from the Hamilton of eastern New York;Arnold;Contrib. Mus. Palaeontol. Univ. Mich.,1937