Ilison, L., Salupere, A., & Peterson, P. (2007). On the Propagation of Localized Perturbations in Media with Microstructure. Proceedings of the Estonian Academy of Sciences. Physics, Mathematics, 56(2), 84-92. https://www.airitilibrary.com/Article/Detail?DocID=14060086-200706-201011080021-201011080021-84-92