Pujalte V., Diéguez C. y Hernández J. M. (2009). A fern-bennettitalean floral assemblage in Tithonian- Berriasian travertine deposits (Aguilar Formation, Burgos- Palencia, N Spain) and its palaeoclimatic and vegetational implications. Journal of Iberian Geology, 35(2), 127-140. https://revistas.ucm.es/index.php/JIGE/article/view/JIGE0909220127A