Genis, I. L.; Krylov, N. V. Über die genauen Schranken in einem Problem mit Richtungsableitung. (Russian) Zbl 0256.35026 Sib. Mat. Zh. 14, 36-43 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 35J15 Second-order elliptic equations 35J25 Boundary value problems for second-order elliptic equations 35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs PDFBibTeX XMLCite \textit{I. L. Genis} and \textit{N. V. Krylov}, Sib. Mat. Zh. 14, 36--43 (1973; Zbl 0256.35026)