Aliya Fahmi Naveed Yaqoob Wathek Chammam Maclaurin symmetric mean aggregation operators based on cubic Pythagorean linguistic fuzzy number. 1925-1942 2021 12 J. Ambient Intell. Humaniz. Comput. 2 https://doi.org/10.1007/s12652-020-02272-9 https://www.wikidata.org/entity/Q114220468 db/journals/jaihc/jaihc12.html#FahmiYC21