1. Tech. Rep. S-76-7;M.J. Hvorslev,1976
2. Rep. No. Ci;V. Askegaard,1963
3. Eshelby, J.D., “The Determination of the Elastic Field of an Ellipsoidal Inclusion and Related Problems,”Proc. Roy. Soc., Series A,241 (1226),376–396 (1957).
4. Askegaard, V., “Stress and Strain Measurements in Solids,” Proc. 6th Int. Conf. on Exp. Stress Analysis, VDI-Verlag, 259–268 (1978).
5. Askegaard, V., “Stress and Strain Measurements in Solid Materials,” Rep. No. R 92, Structural Research Laboratory, Tech. Univ. of Denmark (1979).