1. Paleontologia de los carbones paleozoicos Peruanos;Alleman,1985
2. Licopodos de Paracas: Significacion geologica y paleo-climatologica;Alleman;Bol. Soc. Geol. Perú,1988
3. On some new species of Lagenostoma, a type of pteridospermous seed from the Coal Measures;Arber,1905
4. Three dwarf lycophytes from the Carboniferous of Argentina;Archangelsky;Scr. Geol.,1981
5. Lagenospermum imparirameum sp. nov., a seed-bearing fructification from the Mississippian of Pennsylvania and Virginia;Arnold;Bull. Torrey Bot. Club.,1939