El Mouridi, M., Laurent, T., Brancheriau, L., Arnould, O., Famiri, A., Hakam, A. and Gril, J. 2014. Searching for material symmetries in the burr wood of thuja by a direct contact ultrasonic method on spherical samples. Maderas. Ciencia y Tecnología. 13, 3 (Dec. 2014), 285–296.