Sedykh, V. D. The four-vertex theorem of a plane curve and its generalizations. (Russian. English summary) Zbl 1031.53500 Soros. Obraz. Zh. 6, No. 9, 122-127 (2000). Reviewer: V.A.Alexandrov (Novosibirsk) MSC: 53A04 00A06 51-01 PDFBibTeX XMLCite \textit{V. D. Sedykh}, Soros. Obraz. Zh. 6, No. 9, 122--127 (2000; Zbl 1031.53500)
Stepanov, S. E. The Gauss-Bonnet theorem. (Russian. English summary) Zbl 1031.53503 Soros. Obraz. Zh. 6, No. 9, 116-121 (2000). Reviewer: V.A.Alexandrov (Novosibirsk) MSC: 53A05 00A06 51-01 PDFBibTeX XMLCite \textit{S. E. Stepanov}, Soros. Obraz. Zh. 6, No. 9, 116--121 (2000; Zbl 1031.53503)
Artemov, A. A. “Geometry” of the Fibonacci numbers and other recursive sequences of the second order. (Russian. English summary) Zbl 1064.00502 Soros. Obraz. Zh. 6, No. 9, 110-115 (2000). Reviewer: V. A. Alexandrov (Novosibirsk) MSC: 00A35 11B39 PDFBibTeX XMLCite \textit{A. A. Artemov}, Soros. Obraz. Zh. 6, No. 9, 110--115 (2000; Zbl 1064.00502)