1. Feller, R. L., Stolow, N., and Jones, E. H. On Picture Varnishes and Their Solvents, The Press of Case Western Reserve University, Cleveland and London, 1971, pp. 122–123.
2. Mühlethaler, B. Kleines Handbuch der Konservierungstechnik, Paul Haupt, Berne, 1967, p. 82.