Kazuhiro KANEDA, Masamichi AOKI, and Satoru OHTSUKA, “ASSESSING THE ULTIMATE BEARING CAPACITY OF FOOTING IN A TWO-LAYERED CLAYEY SOIL SYSTEM USING THE RIGID PLASTIC FINITE ELEMENT METHOD”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 17, no. 60, pp. 144–150, Aug. 2019.