Stress state of an untouched bed layer and surrounding rocks
Tài liệu tham khảo
E. W. Hobson, Spherical and Ellipsoidal Harmonics, IL, Chelsea Publ. (1955).
Yu. N. Podil'chuk, “Deformation of an elastic spheroid,” Prikl. Mekh.,3, No. 12, 34–42 (1967).