Rubio, V., Vigil, R., García, R. y Cala, V. 1997. Physico-chemical study of the ancient and recent accumulations of a braided system (Ara river. Central Pyrenees, Spain). Pirineos. 149-150, (dic. 1997), 105–119. DOI:https://doi.org/10.3989/pirineos.1997.v149-150.129.