1. Estudio de Frenelopsis oligostomata (Romariz) Alvin, procedente del Cretacico supérior de Torrelaguna (Madrid);Alvarez-Ramis;Estudios Geologicos,1981
2. Nouvelles observations au microscope électronique à balayage sur la cuticule de Frenelopsis oligostomata Romariz emend;Alvarez-Ramis,1987
3. The conifer Frenelopsis and Manica in the Cretaceous of Portugal;Alvin;Palaeontology,1977
4. Cheirolepidiaceae: biology, structure and paleoecology;Alvin;Review of Palaeobotany and Palynology,1982
5. Modified axillary branching in species of the genus Frenelopsis: a new phenomenon among conifer;Alvin;Botanical Journal of the Linnean Society,1979