1. L. A. Gribov, Zh. Prikl. Spektroskop., 77,No. 1, 5 (2010).
2. L. A. Gribov, J. Struct. Chem., 51, No. 5, 805–809 (2010).
3. L. A. Gribov, Elements of Quantum Theory of the Structure and Properties of Molecules [in Russian], Izdatel’skii Dom Intellekt (2010).
4. R. P. Feynman, Phys. Rev., 56, 340 (1939).
5. N. Bohr, in: A Centenary Volume, A. P French and P. J. Kennedy (eds.), Harvard University Press, Cambridge M.A., USA (1985).