1. S. Arora, C. Lund, Hardness of Approximations, in Approximation Algorithms for NP-Hard Problems, D. S. Hochbaum (ed.), PWS Publishing, Boston 1995, 399–446.
2. C. Bazgan, W. Fernandez de la Vega and M. Karpinski, Approximability of dense instances of NEAREST CODEWORD problem, ECCC Tech. Report TR00-091, 2000, to appear in Proc. 8th SWAT (2002).
3. Lect Notes Comput Sci;P. Berman,1999
4. P. Berman and M. Karpinski, Approximating Minimum Unsatisfiability of Linear Equations, ECCC Technical Report, TR01-025, 2001, also in Proc. 13th ACM-SIAM SODA (2002), 514–516.
5. T. N. Bui and C. Jones, Finding Good Approximate Vertex and Edge Partitions is Hard, Inform. Process. Letters 42 (1992), 153–159.