„… .: Removal of air pollutant mixtures from museum display cases. Studies in Conservation, 36 (1991), S …” „… [Menart et al., 2011] Menart, E., De Bruin, G., Strlič, M.: Dose-response functions for historic paper …” „… . 1378–1383 [Parmar und Grosjean, 1991] Parmar, S. S., Grosjean, D.: Sorbent removal of air pollutants from …”