García-Garmilla, F., I. Rodríguez Maribona, M. Cano, M. Zalbide, J. A. Ibáñez-Gómez, E. Osa-Chans, and S. Garín. “An Analytical Comparison of Two Commercial Consolidating Products Applied to Eocene Sandstones from 16th and 19th Century Monuments in San Sehastián, Northern Spain”. Materiales De Construcción, vol. 52, no. 266, June 2002, pp. 5-18, doi:10.3989/mc.2002.v52.i266.331.