Iain A. Stewart On Two Approximation Algorithms for the Clique Problem. [Citation Graph (0, 0)][DBLP] Int. J. Found. Comput. Sci., 1993, v:4, n:2, pp:117-133 [Journal]
Matthew Dickerson General Polynomial Decomposition and the s-1-Decomposition are NP-Hard. [Citation Graph (0, 0)][DBLP] Int. J. Found. Comput. Sci., 1993, v:4, n:2, pp:147-156 [Journal]