@article {Astley:1993:0736-2935:221,
title = "Wave envelope element formulations for exterior acoustic problems: Status and projections",
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 = "221-224",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1993/00001993/00000006/art00035",
keyword = "13.1.5, 23.1",
author = "Astley, R.J. and Macaulay, G.J. and Coyette, J.P.",
abstract = "",
}