1. Axisymmetric problem of action of an annular punch on an elastic half-space;Aleksandrov;Inzh. zh. MTT,1967
2. Plane annular cut in an elastic space;Gubenko;Trudy Dnepropetrovsk. inst. inzh. zh.-d. transp.,1964
3. Expansion of an elastic space weakened by an annular crack;Grinchenko;Prikl. mekhanika,1965