1. Liknopetalon: a review of a rare gondwanan, Permian pteridophyte;Adendorff;Rev. Palaeobot. Palynol.,2003
2. Palaeoflora of Southern Africa. Prodromus of South African megafloras, Devonian to Lower Cretaceous;Anderson,1985
3. Three dwarf lycophytes from the Carboniferous of Argentina;Archangelsky;Scripta Geol.,1981
4. Licofitas arborescentes de la Formación Cerro Agua Negra (Província de San Juan);Azcuy;Ameghiniana,1987
5. Fossil in situ spores and pollen grains: an annotated catalogue;Balme;Rev. Palaeobot. Palynol.,1995