Korol’kov, Yu. D. Über Familien allgemein-rekursiver Funktionen ohne isolierte Punkte. (Russian) Zbl 0423.03050 Mat. Zametki 26, 747-755 (1979). MSC: 03D45 PDFBibTeX XMLCite \textit{Yu. D. Korol'kov}, Mat. Zametki 26, 747--755 (1979; Zbl 0423.03050)
Penzin, Yu. G. The problem of twin primes in formal arithmetic. (Russian) Zbl 0422.03034 Mat. Zametki 26, 505-511 (1979). MSC: 03F30 11N05 03H15 11U10 PDFBibTeX XMLCite \textit{Yu. G. Penzin}, Mat. Zametki 26, 505--511 (1979; Zbl 0422.03034)
Kanovej, V. G. On a consequence of Martin’s axiom. (Russian) Zbl 0417.03026 Mat. Zametki 26, 113-121 (1979). MSC: 03E55 03E50 PDFBibTeX XMLCite \textit{V. G. Kanovej}, Mat. Zametki 26, 113--121 (1979; Zbl 0417.03026)