Del Brio, Esther B.; Ñíguez, Trino-Manuel and Perote, Javier (2008): Multivariate Gram-Charlier Densities. Published in: Documentos de Trabajo FUNCAS, No. 381 (2008)
Waters, J (2011): Cost structures and the movement of the innovation locus: a derived network approach. Unpublished.
Waters, James (2011): The effect of the Sarbanes-Oxley Act on innovation. Unpublished.