“…It is very useful for collecting a set of documents to provide a general overview of leading trends. Bibliometric studies have been developed in a wide range of topics, including computational intelligence [45], fuzzy set operators [35], fuzzy decision making [5], linguistic decision making [51], intuitionistic fuzzy sets [52], aggregation operators [50], ordered weighted averages [21,24], grey systems [49], genetic algorithms [16] and ant colony optimization [18]. More generally, there are bibliometric studies in a wide range of areas, including mathematics [4], computer science [60], physics [58], economics [6,15], management [40], and operations research and management science [37].…”