Xinxing Wu Shudi Liang Yang Luo Gül Deniz Çayli Construction methods for the smallest and largest uni-nullnorms on bounded lattices. 132-148 2022 427 Fuzzy Sets Syst. https://doi.org/10.1016/j.fss.2021.02.010 db/journals/fss/fss427.html#WuLLC22
