ROUGE scores attained by different methods for DUC2001 and DUC2002 data sets.

Here our proposed methods are executed using Normalized Google Distance (NGD), Cosine Similarity (CS) and Word Mover Distance (WMD), and, SMaxRouge strategy is used for selecting a single best solution from the final Pareto front. Here, † denotes the best results; it also indicates that results are statistically significant at 5% significance level; xx indicates results are not available in reference paper. For LeastMedSq and Linear Regression methods, results in the reference paper are presented up to 4 decimal points, therefore, to make a fair comparison up to 5 decimal points, we have added 0 as the last decimal digit such that their results remain unchanged. Similar case also applicable to NN-SE and SummaRuNNer methods.