1. Damage diagnosis on stone monuments—Weathering forms, damage categories and damage indiceshttp://www.stone.rwth-aachen.de/decay_diagnosis.pdf
2. Stone Decay and Conservation: Atmospheric Pollution, Cleaning, Consolidation and Protection;Amoroso,1983
3. Stone in Architecture. Properties, Durability;Winkler,1994
4. Salt Weathering Hazard;Goudie,1997
5. Natural weathering of wood and its control by water-repellent preservatives;Feist;Am. Painting Contractor,1992