Literature

Authors	Year	Title
J. H. F. Kerp, Poort, R. J., Swinkels, h.A. J. M., Verwer, R.	1990	Aspects of Permian Palaeobotany and Palynology. IX. Conifer-dominated Rotliegend floras from the Saar-Nahe basin (?Late carboniferous-early permian; SW-Germany) with special reference to the reproductive biology of early conifers
J. A. Clement-Westerhof	1987	Aspects of Permian palaeobotany and palynology, VII. The Majonicaceae, a new family of Late Permian conifers
J. A. Clement-Westerhof	1984	Aspects of Permian palaeobotany and palynology IV. The conifer Ortiseia Florin from the Val Gardena Formation of the Dolomites and The Vicentinian Alps (Italy) with special reference to a revised concept of the Walchiaceae (Goeppert) Schimper
G. W. Rothwell, Mapes, G., Mapes, R. H.	1996	Anatomically preserved vojnovskyalean seed plants in Upper Pennsylvanian (Stephanian) marine shales of North America
B. C. J. Dumortier	1829	Analyse des familles des plantes, avec l'indication des principaux genres qui s'y rattachent
A. Barber, Crow M. J.	2003	An evaluation of the plate tectonic models for the development of Sumatra
W. A. DiMichele, Mamay, S. H., Chaney, D. S., Hook, R. W., W. Nelson, J.	2001	An Early Permian flora with Late Permian and Mesozoic affinities from North-Central Texas
M. W. Frohlich, Chase M. W.	2007	After a dozen years of progress the origin of angiosperms is still a great mystery
L. Grauvogel-Stamm, Grauvogel L.	1975	Aetophyllum Brongniart 1828, conifer (Non equisetal) from the Voltzia Sandstone (Upper Bunter) of the Vosges (France), a preliminary account
R. Serbet, Escapa, I., Taylor, T. N., Taylor, E. L., Cúneo, R.	2010	Additional observations on the enigmatic Permian plant Buriadia and implications on early coniferophyte evolution
Z. Š. imůnek, Martínek K.	2009	A study of Late Carboniferous and Early Permian plant assemblages from the Boskovice Basin, Czech Republic
D. Vachard	1989	A rich algal micro-flora from the Lower Permian of Jambi Province
E. Alexander Arber	1914	A revision of the seed impressions of the British coal measures
C. J. Cleal, Shute, C., Hilton, J., Carter, J.	2009	A revision of the Pennsylvanian-aged Eremopteris-bearing seed-plant
Z. Gao, Thomas B. A.	1989	A review of fossil cycad megasporophylls, with new evidence of Crossazamia Pomel and its associated leaves from the Lower Permian of Taiyuan, China
T. C. Fischer, Butzmann, R., Kerp, J. H. F., E., K., Meller, B., Van Cittert, J. H. A. van	2008	A remarkable gymnosperm flora from the Permian of Bletterbach (Dolomites, N-Italy) - 12th International Palynological Congress & 6th International Organisation of Palaeobotany Conference, 30.08.-5.09.2008, Bonn
K. C. Nixon, Crepet, W. L., Stevenson, D. W., E.M., F.	1994	A re-evaluation of seed plant phylogeny.
C. N. Miller, Jr., Brown J. Thomas	1973	A new Voltzialean cone bearing seeds with embryos from the Permian of Texas
T. Delevoryas, Morgan J.	1954	A New Pteridosperm from Upper Pennsylvanian Deposits of North America
J. Lindley	1836	A natural system of botany or a systematic view of the organisation, natural affinity and distribution of the whole vegetal system; together with the use of the most important species in medicine.
J. Hart	1987	A cladistic analysis of conifers: premininary results