Baltrėnas, P., D. Butkus, V. Nainys, R. Grubliauskas, and J. Gudaitytė. “Efficiency Evaluation of a Noise Barrier”. Journal of Environmental Engineering and Landscape Management, vol. 15, no. 3, Sept. 2007, pp. 125-34, doi:10.3846/16486897.2007.9636920.