1. A sporomorph ecogroup model for the Northwest European Jurassic–Lower Cretaceous: concepts and framework;Abbink;Geologie en Mijnbouw,2004
2. Late Cretaceous palynomorphs from northeastern Arizona;Agasie;Micropaleontology,1969
3. Algunas precisiones sobre la sedimentación y paleontología del Cretácico inferior en la zona de Utrillas-Villarroya de los Pinares;Aguilar;Estudios Geológicos,1971
4. Late Cretaceous Carbonate Platforms: Origin and Evolution, Iberian Range, Spain;Alonso,1993
5. Leaf anatomy of Weichselia based on fusainized material;Alvin;Palaeontology,1974