Singularly disturbed de la Vallee Poussin problem with two vanishing spectral points
English version (Springer): Ukrainian Mathematical Journal 35 (1983), no. 5, pp 459-465.
Citation Example: Singularly disturbed de la Vallee Poussin problem with two vanishing spectral points // Ukr. Mat. Zh. - 1983. - 35, № 5. - pp. 545—551.
Full text