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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Ondas</topic></authority><related type="narrower"><topic>Olas</topic></related><related type="narrower"><topic>Ondas electromagnéticas</topic></related><related type="narrower"><topic>Ondas sísmicas</topic></related><related type="narrower"><topic>Solitones</topic></related><related type="narrower"><topic>Ondas sonoras</topic></related><related type="narrower"><topic>Refracción</topic></related><related type="narrower"><topic>Reflexión (Física)</topic></related><related type="other"><topic>Óptica</topic></related><related type="other"><topic>Mecánica ondulatoria</topic></related><related type="other"><topic>Difracción</topic></related><related type="broader"><topic>Vibraciones</topic></related></mads>