2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/133255I show that the claims in Phys. Rev. Lett. 98, 257602 by Betouras et al concerning YMn2O5 are incorect.1 page, 1 figureMaterials ScienceComment on "Multiferroicity Induced by Dislocated Spin-Density Waves"text