“I greatly enjoyed reading this book, which covers a new, vigorously developing part of magnetism. Demokritov has managed to encourage the leading players in the field to give their views of the current status quo and to share with us their visions of the future development of the spin-wave studies in nanostructures. The book not only explains the physics of spin waves to the young students, but it also brings a lot of valuable facts and ideas to the experts in magnetic dynamics.” Boris A Kalinikos Colorado State University, USA

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