Linear and nonlinear phase accumulation of backward volume magnetostatic spin waves in yttrium-iron-garnet spin-wave waveguidesT. Schneider, A. A. Serga, B. Hillebrands and M. P. KostylevEPL, 77 5 (2007) 57002DOI: https://doi.org/10.1209/0295-5075/77/57002