Hideyuki Ito, Koichi Yamanaka, Shoma Nehashi, Atsushi Fukuda, and Kunio Minegishi, “COMPARATIVE ANALYSIS OF THREE EMBANKMENT METHODS FOR ROAD CONSTRUCTION BY LIFE CYCLE ASSESSMENT AND COST”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 8, no. 16, pp. 1278–1282, Jun. 2016.