1. Contribution of calcium from limestone and mortar to the decay of granite walling;Cooper,1991
2. Chemical analysis of thin black layers on building stone;Nord;Stud. Conserv.,1993
3. Microfabrics of weathered granite in urban monuments;Schiavon,1993
4. Weathering of granite in a polluted environment: Budapest;Smith,1993
5. Microscopical and chemical analysis of black patinas on granite;Schiavon,1994