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2. Ultrastructure of the tapetal membranes in grasses;Banerjee;Grana Palynol.,1967
3. Epidermisuntersuchungen an einigen inkohlten Pteridospermenblättern des Oberkarbons und Perms;Barthel,1962
4. Spore Populations of some Plants of Divisions Lycophyta, Sphenophyta, Pteridophyta and Progymnospermophyta from the Carboniferous Limnic Basins of the Czech Republic;Bek,1998
5. Fossil Flora of Sydney Coalfield, Nova Scotia;Bell;Geol. Surv. Canada, Mem.,1938