Grigor’eva, N. S. Abschätzung der Greenschen Funktion der Helmholtzschen Gleichung in der Schattenzone im dreidimensionalen Fall. (Russian) Zbl 0329.35017 Zh. Vychisl. Mat. Mat. Fiz. 16, 525-526 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation 35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs PDF BibTeX XML Cite \textit{N. S. Grigor'eva}, Zh. Vychisl. Mat. Mat. Fiz. 16, 525--526 (1976; Zbl 0329.35017)