Elandt, K., Hellemann, K., Rath, M., Hellemann, K. M., Pinna, D. and Lorusso, S. (2003) “Preventive Methods to reduce the deterioration of monuments and outdoor art by microbe burden of the solid-micro-dust-fraction”, Conservation Science in Cultural Heritage, 3(1), pp. 215–217. doi: 10.6092/issn.1973-9494/565.