Interlineation of functions of two variables on M (M>-2) lines preserving the class ?r(R2)
English version (Springer): Ukrainian Mathematical Journal 42 (1990), no. 12, pp 1452-1461.
Citation Example: Litvin O. N. Interlineation of functions of two variables on M (M>-2) lines preserving the class ?r(R2) // Ukr. Mat. Zh. - 1990. - 42, № 12. - pp. 1616–1625.
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