@article {Chen:1993:0736-2935:171, title = "A 3D boundary element method for determination of acoustic eigenfrequencies considering admittance boundary conditions", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1993", volume = "1993", number = "6", publication date ="1993-08-24T00:00:00", pages = "171-176", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1993/00001993/00000006/art00026", keyword = "75.3, 13.2.1", author = "Chen, Z.S. and Hofstetter, G. and Mang, H.A.", abstract = "", }