1. Migliore, L. et al. Purple spot damage dynamics investigated by an integrated approach on a 1244 A.D. parchment roll from the Secret Vatican Archive. Scientific Reports 7, 9521 (2017).
2. Piñar, G., Sterflinger, K. & Pinzari, F. Unmasking the measles-like parchment discoloration: molecular and micro-analytical approach. Environm. Microbiol. 17(2), 427–443 (2015).
3. Migliore, L. et al. Il rotolo A.A. Arm. I-XVIII 3328 dell’Archivum Arcis: studi letterari e scientifici, interventi di restauro. Dall’Archivio Segreto Vaticano. Miscell. testi, saggi, inventari IX, 403–421 (2016).
4. Gallo, F. & Strzelczyk, A. Indagine preliminare sulle alterazioni microbiche della pergamena. Bollett. Ist. Centr. Patologia Libro “Alfonso Gallo” 30(1/2), 71–87 (1971).
5. Odum, P. E. Fundamentals of Ecology. W. B. Saunders Co., Philadelphia (1953).