@article {Liu:2004:0736-2935:366, title = "Active noise reduction in helicopters using trailing edge flaps", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "2004", volume = "2004", number = "9", publication date ="2004-09-20T00:00:00", pages = "366-377", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2004/00002004/00000009/art00032", keyword = "38.2, 13.1.4", author = "Liu, Li and Patt, Dan and Friedmann, Peretz P. and Bernstein, Dennis S.", abstract = "", }