1. Higgins DD (1982) Removal of stains and growths from concrete. Appearance Matters 5:1–11
2. Verhoef LGW (1988) Soiling and cleaning of building facades, report of the technical committee 62 SCF, RILEM. Chapman and Hall, London
3. Wee YC, Lee KB (1980) Proliferation of algae on surfaces of buildings in Singapore. Int Biodeter Bull 16(4):113–117
4. Ryan NM (1983) Algal growth on cementitious surfaces, Pilot study of the National Institute for Physical Planning and Construction Research. In: Hopton JW, Hill EC (eds) Industrial microbiological testing, vol 23, 1st edn. Wiley-Blackwell, London, pp 55–65
5. Stoecker JG (2001) A practical manual on microbiologically influenced corrosion, 2nd ed., vol. 2, NACE International, Houston, Texas, USA, pp 4.1–4.10