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2. Ioakimidis, N. I.: Application of finite-part integrals to the singular integral equations of crack problems in plane and three-dimensional elasticity. Acta Mech.45, 31?47 (1982).
3. Ioakimidis, N. I.: On the validity of the singular integral equations of crack problem at the crack tips. Acta Mech.48, 185?191 (1983).
4. Petukhov, I. M., Zubkov, V. V., Zubkova, I. A., Linkov, A. M.: The stress state of rocks around the opening of an arbitrary plane form. Fiziko-tekhnicheskie problemi ruzrabotki poleznikh iskopaemikh5, 3?8 (1982) [In Russian, translated into English in Sov. Min. Sci.]
5. Linkov, A. M., Mogilevskaya, S. G.: Finite-part integrals in three-dimensional crack problems. Prikladnaia Mat. i Mech.50, 844?850 (1986) [In Russian, translated into English in J. Appl. Math. Mech.50, 652?658 (1986)].