Zhitomirskij, M. Ya. On the finite determinability of formal series. (Russian) Zbl 0582.57020 Teor. Funkts., Funkts. Anal. Prilozh. 38, 57-66 (1982). Reviewer: E.Ljubenova MSC: 57R45 57S20 58C25 58K99 22E60 PDFBibTeX XMLCite \textit{M. Ya. Zhitomirskij}, Teor. Funkts. Funkts. Anal. Prilozh. 38, 57--66 (1982; Zbl 0582.57020)
Gomberg, A. M. Normal forms of families with respect to the filtering action of a group. (Russian) Zbl 0533.58006 Teor. Funkts., Funkts. Anal. Prilozh. 38, 18-22 (1982). Reviewer: Vasile Oproiu (Iaşi) MSC: 58C25 58K99 58A20 32Sxx 57S99 PDFBibTeX XMLCite \textit{A. M. Gomberg}, Teor. Funkts. Funkts. Anal. Prilozh. 38, 18--22 (1982; Zbl 0533.58006)
Zhitomirskiĭ, M. Ya. On the equivalence of differential forms. (Russian) Zbl 0467.58003 Teor. Funkts. Funkts. Anal. Prilozh. 35, 35-41 (1981). MSC: 58A10 34C15 11E16 58C25 58K99 34E15 PDFBibTeX XMLCite \textit{M. Ya. Zhitomirskiĭ}, Teor. Funkts. Funkts. Anal. Prilozh. 35, 35--41 (1981; Zbl 0467.58003)