Weakening of fuzzy relational queries: an absolute proximity relation-based approach. P. Bosc, A. HadjAli, O. Pivert (2007) Mathware and Soft Computing
Worst case analysis of two heuristics for the set partitioning problem A. Marchetti Spaccamela, A. Pelaggi (1987) RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications