M. Weiler, H. Huebl, F. S. Goerg, F. D. Czeschka, R. Gross, S. T. B. Goennenwein: Spin Pumping with Coherent Elastic Waves. 2012Physical Review Letters: 108. ISBN 0031-9007 http://dx.doi.org/10.1103/PhysRevLett.108.176601