Akhiezer, N. I.; Efimov, N. V.; Kreĭn, M. G.; Lavrent’ev, M. A.; Marchenko, V. A.; Ostrovskiĭ, I. V.; Shabat, B. V. Boris Yakovlevich Levin (on his 70th birthday). (English) Zbl 0386.01010 Russ. Math. Surv. 32, No. 5, 181-184 (1977). MSC: 01A70 PDFBibTeX XMLCite \textit{N. I. Akhiezer} et al., Russ. Math. Surv. 32, No. 5, 181--184 (1977; Zbl 0386.01010) Full Text: DOI
Akhiezer, N. I.; Efimov, N. V.; Kreĭn, M. G.; Lavrent’ev, M. A.; Marchenko, V. A.; Ostrovskiĭ, I. V.; Shabat, B. V. Boris Yakovlevich Levin (on his 70th birthday). (Russian) Zbl 0357.01044 Usp. Mat. Nauk 32, No. 5(197), 211-213 (1977). MSC: 01A70 PDFBibTeX XMLCite \textit{N. I. Akhiezer} et al., Usp. Mat. Nauk 32, No. 5(197), 211--213 (1977; Zbl 0357.01044) Full Text: MNR