1. Chu-jian, D., Ying-ren, Z., Jian-kai, Z.: Formula of intermediate principal stress at failure for Mohr-Coulomb material in plane strain state. Rock Soil Mech. 29(2), 310–314 (2008)
2. Satake, M.: Stress-deformation and strength characteristics of soil under three different principal stresses. Proc. Jpn. Soc. Civ. Eng. 23(2), 59–70 (1976)
3. Ting, L., Yang-ping, Y., Hajime, M.: Soil strength equation in plane strain based on SMP. Rock Soil Mech. 21(4), 390–393 (2001)
4. Li, G., Xie, Y., Cheng, Z.H.: Formula of intermediate principal stress at failure for cohesive soil in plane strain state. Chin. J. Rock Mech. Eng. 23(18), 3174–3177 (2004)
5. Zhang, Y., Sheng-jun, S., Li-qin, W., Lin, M.A.: Analysis and verification of soil strength criteria in plane strain state. Rock Soil Mech. 36(9), 2501–2509 (2015)