Bitsadze, A. V.; Kantorovich, L. V.; Lavrent’ev, M. A. Sergeĭ L’vovich Sobolev (on his sixtieth birthday). (English) Zbl 0188.30609 Russ. Math. Surv. 23, No. 5, 131-140 (1968). MSC: 01A70 PDFBibTeX XMLCite \textit{A. V. Bitsadze} et al., Russ. Math. Surv. 23, No. 5, 131--140 (1968; Zbl 0188.30609) Full Text: DOI
Bitsadze, A. V.; Kantorovich, L. V.; Lavrent’ev, M. A. Sergeĭ L’vovich Sobolev (on his sixtieth birthday). (Russian) Zbl 0159.00804 Usp. Mat. Nauk 23, No. 5(143), 177-186 (1968). MSC: 01A70 PDFBibTeX XMLCite \textit{A. V. Bitsadze} et al., Usp. Mat. Nauk 23, No. 5(143), 177--186 (1968; Zbl 0159.00804) Full Text: MNR