1. On finite element methods of the least squares type;Fix;Comp. & Maths. with Appls.,1979
2. On numerical methods for acoustic problems;Fix;Comp. & Maths. with Appls.,1980
3. Shear Bands in Elastic-Perfectly Plastic Media;Lee,1981
4. G. J. Fix and E. Stephan, Finite element methods of the least squares type for regions with corners. Research Report 81-7, Carnegie-Mellon University