1. P. S. Theocaris and N. I. Ioakimidis, Quarterly of Applied Mathematics 35 (1977) 173?183.
2. N. I. Ioakimidis, General Methods for the Solution of Crack Problems in the Theory of Plane Elasticity, Doctoral thesis at the National Technical University of Athens, Athens (1976) [Available from: University Microfilms, order no. 76-21, 056 (1976); referenced in: Bulletin Signalétique (Section 130: Physique) 37 (1976) 1102; Physics Abstracts 79 (1976) 5841, 5843; Dissertation Abstracts International (Section C) 37 (1976/77) 417; Zentralblatt für Mathematik 351 (1978) 469?470].
3. S. Krenk, ?A quadrature formula of closed type for solution of singular integral equations?, Report of the Danish Center for Applied Mathematics and Mechanics (or of Lehigh University) (1976).
4. S. Christiansen, Review to [1], Zentralblatt für Mathematik 353 (1978) 248.