[1] Shchegolikhin, A.N. (2011) Dynamics Research Solid State in Organic Crystals. Thesis PhD, Institute of Biochemical Physics of N.M.Emanuelja of Russian Academy of Sciences, Moscow, 142.
[2] Ershov, V.V. and Belostotskaja, I.S. (1965) Di-Tert-Butylspirocyclodienones. Herald of Russian Academy of Sciences, Series chemistry, 1301. [In Russian]
[3] Chamot, D. and Pirkle, W. (1969) Direct Nuclear Magnetic Resonance Observation of Stereochemically Distinctions. Journal of the American Chemical Society, 91, 1569-1571.
http://dx.doi.org/10.1021/ja01034a070