Ivanov, V. P. Forming an acoustic Halo-type field. (English. Russian original) Zbl 0900.76550 Dokl. Math. 52, No. 3, 450-453 (1995); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 345, No. 5, 601-604 (1995). MSC: 76Q05 Hydro- and aero-acoustics 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation PDF BibTeX XML Cite \textit{V. P. Ivanov}, Dokl. Math. 52, No. 3, 450--453 (1995; Zbl 0900.76550); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 345, No. 5, 601--604 (1995) OpenURL