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3. Development of Investigations on Percolation Theory in the USSR (1917–1967) (Nauka, Moscow, 1969) [in Russian].
4. G. K. Mikhailov and V. N. Nikolaevskii, in Mechanics in the USSR for 50 Years (Nauka, Moscow, 1970), Vol. 2, pp. 585–648 [in Russian].
5. J. Bear, D. Saslavsky, and S. Irmay, Physical Principles of Water Percolation and Seepage (UNESCO, Paris, 1968; Mir, Moscow, 1971).