1. Generation of elements with singularities;AKIN;Int. J. Numer. Meth. Eng.,1976
2. ATLURI, S.N., Higher-order special and singular finite elements. Chapter 4 of A.K. Noor and W. Pilkey (eds.), Survey of Finite Element Methods. American Soc. Mech. Eng. (1980).
3. Error analysis of finite element methods with triangles for elliptic boundary value problems;BARNHILL,1973
4. Error analysis of Galerkin methods for Dirichlet problems containing boundary singularities;BARNHILL;J. Inst. Math. Applics.,1975
5. On the use of isoparametric finite elements in linear fracture mechanics;BARSOUM;Int. J. Numer. Meth. Eng.,1976