1. A. A. Glagolev, On Geometric Methods of Quantitative Analysis of Minerals [in Russian], Moscow-Leningrad (1933).
2. I. P. Tereshchenko and M. V. golovanov, Author's Certificate (USSR) 526661 (1974).
3. A. A. Shpakov and A. V. Kosarev, Biofizika, No. 6, 1046 (1976).
4. A. A. Shpakov, Biofizika, No. 1, 85 (1978).
5. A. A. Shpakov, Nauchno Tekh. Inf. (VINITI), Seriya 1, No. 5, 14 (1978).