@article {Kopff:1988:0736-2935:1069, title = "Using mechanical anti-noise sources for cancelling the harmonic part of the sound radiated by electric machines", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1988", volume = "1988", number = "3", publication date ="1988-08-30T00:00:00", pages = "1069-1072", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1988/00001988/00000003/art00044", keyword = "38.2, 11.2", author = "Kopff, Mariette and Kopff, Paul", abstract = "", }