Berezovskij, N. I.; Nagnibida, N. I. On the solutions of an operator equation in the space of functions analytical in a circle. (Ukrainian) Zbl 0457.47020 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 9, 5-9 (1980). MSC: 47A62 47B38 46E10 PDFBibTeX XMLCite \textit{N. I. Berezovskij} and \textit{N. I. Nagnibida}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 9, 5--9 (1980; Zbl 0457.47020)
Slyusarchuk, V. Yu. Reversibility of functionally differential operators. (Ukrainian) Zbl 0446.47031 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 9, 27-31 (1980). MSC: 47E05 47B38 PDFBibTeX XMLCite \textit{V. Yu. Slyusarchuk}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 9, 27--31 (1980; Zbl 0446.47031)