Cheremskaya, N. V. Sequences in Hilbert space generated by partial difference equations. (Russian) Zbl 0973.47005 Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 475, 366-374 (2000). MSC: 47A48 47B39 PDFBibTeX XMLCite \textit{N. V. Cheremskaya}, Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 475, 366--374 (2000; Zbl 0973.47005)
Cheremskaya, N. V. Nonstationary sequences generated by differential-difference equations in Hilbert space. (Russian. English summary) Zbl 0948.47016 Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 458, 205-212 (1999). MSC: 47A48 PDFBibTeX XMLCite \textit{N. V. Cheremskaya}, Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 458, 205--212 (1999; Zbl 0948.47016)
Cheremskaya, N. V. Sequences in Hilbert spaces of infinite rank nonstationarity. (Russian. English summary) Zbl 0948.47015 Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 444, 157-161 (1999). MSC: 47A48 60G12 PDFBibTeX XMLCite \textit{N. V. Cheremskaya}, Visn. Khark. Univ., Ser. Mat. Prykl. Mat. Mekh. 444, 157--161 (1999; Zbl 0948.47015)