1. The construction and stability of ϵ.-approxi-mation solutions;Kovalyov,1991
2. Rounding technique in epsilon-approximation scheme construction;Kovalyov,1993
3. M. Kovalyov, “A rounding technique to construct approximation algorithms for knapsack and bin-packing type problems”, submitted.
4. M. Kovalyov, “Improving the complexities of approximation algorithms for optimization problems”, Oper. Res. Lett., to appear.
5. Single machine scheduling with setups to minimize the number of late items: algorithms, complexity and approximation;Kovalyov,1990