1. V. T. Kalinnikov and Yu. V. Rakitin, Introduction to Magnetochemistry (Nauka, Moscow, 1980) [in Russian].
2. Yu. V. Rakitin and V. T. Kalinnikov, Advanced Magnetochemistry (Nauka, St. Petersburg, 1994).
3. E. F. Kustov, VT. Kalinnikov, and V. M. Novotortsev, Russ. J. Inorg. Chem 54, 2107 (2009).
4. A. R. Edmonds, in Angular Momentum in Quantum Mechanics (Princeton Univ. Press, 1957; Inostrannaya Literatura, Moscow, 1958).
5. P. W. Selwood, Magnetochemistry (Interscience, New York 1943; Inostrannaya Literatura, Moscow, 1949).