1. Committée European de Normalisation (CEN) – Adhesives for tiles; Requirements, evaluation of conformity, classification and designation (EN 12004:2007 + A1:2012), Brussels, 2012.
2. CEN – Ceramic tiles, Definition, classification, characteristics, assessment and verification of constancy of performance and marking (EN 14411:2016), Brussels, 2016.
3. CEN - Grout for tiles; Requirements, evaluation of conformity, classification and designation (EN 13888:2009). Brussels, 2009.
4. J.A.C. Lucas, Anomalies on adherent ceramic claddings (in Portuguese). ITCM 28. LNEC, Lisbon (ISBN: 972-49-1886-6), 2001.
5. J. Dufour, G. Della Giustina, Pathology of tiles (in French). Paris, ITBP. Annales de I’ITBP No 426, Julliet-Août 1948, Série Questiones Générales 162, 1948.