1. Landolt-Börnstein;Landolt-Börnstein;2013
2. History of Yttrium and Scandium;Biochemistry of Scandium and Yttrium, Part 1: Physical and Chemical Fundamentals;1999
3. Discovery and History;Scandium: Its Occurrence, Chemistry Physics, Metallurgy, Biology and Technology;1975
4. NON-RUSSIAN REFERENCES;The Analytical Chemistry of Thorium;1963
5. Scandium, Yttrium und die Elemente der seltenen Erden. (Lanthan bis Cassiopeium.);Elemente der Dritten Gruppe;1944