Hamdi, S. E., M. Diakhaté, R. Moutou Pitti, F. Dubois, and A. Chateauneuf. “In Situ Damage Monitoring in Timber Materials: Acoustic Emission Pattern Recognition Approach Based on Hilbert–Huang Transform”. Academic Journal of Civil Engineering, Vol. 33, no. 2, June 2015, pp. 445-8, doi:10.26168/icbbm2015.69.