Assessment of pavement structural strength by the falling weight deflectometerAavik, Andrus; Paabo, Priit; Kaal, TiitThe Baltic journal of road and bridge engineering2006 / 4, p. 193-199 : ill https://bjrbe-journals.rtu.lv/bjrbe/article/view/1822-427X.2006.4.193%E2%80%93199