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Atualizado em 13/05/2026 · De todos da iMusic
![Cover for Freddy Van Oystaeyen · Methods in Ring Theory - Nato Science Series C (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1984 edition] (2011)](https://imusic.b-cdn.net/images/item/original/719/9789400963719.jpg?freddy-van-oystaeyen-2011-methods-in-ring-theory-nato-science-series-c-paperback-book&class=scaled&v=1593845004)
![Cover for Freddy Van Oystaeyen · Perspectives in Ring Theory - Nato Science Series C (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1988 edition] (2011)](https://imusic.b-cdn.net/images/item/original/412/9789401078412.jpg?freddy-van-oystaeyen-2011-perspectives-in-ring-theory-nato-science-series-c-paperback-book&class=scaled&v=1567055027)
![Cover for Freddy Van Oystaeyen · Perspectives in Ring Theory - Nato Science Series C: (Hardcover Book) [1988 edition] (1988)](https://imusic.b-cdn.net/images/item/original/367/9789027727367.jpg?freddy-van-oystaeyen-1988-perspectives-in-ring-theory-nato-science-series-c-hardcover-book&class=scaled&v=1590050782)
![Cover for Freddy Van Oystaeyen · Methods in Ring Theory - NATO Science Series C (Hardcover Book) [1984 edition] (1984)](https://imusic.b-cdn.net/images/item/original/436/9789027717436.jpg?freddy-van-oystaeyen-1984-methods-in-ring-theory-nato-science-series-c-hardcover-book&class=scaled&v=1566140878)