فهرس المقالات George Anastassiou المقاله 1 - Fuzzy Ordinary and Fractional General Sigmoid Function Activated Neural Network Approximation 10.30495/tfss.2023.1979163.1063 George Anastassiou Transactions on Fuzzy Sets and Systems , العدد 4 , السنة 2 , پاییز-زمستان 2023