Sterflinger, K..
(1999):
Patination of marble at "Euromarble" exposure sites - iron stain versus biopigments.
In: 9th Eurocare Euromarble workshop EU 496, 08.-09.October 1998, Munich, Forschungsbericht 17/1999, Bayerisches Landesamt für Denkmalpflege, pp. 83-91