List of Articles Product Open Access Article Abstract Page Full-Text 1 - The category of L-algebras Lavinia Corina Ciungu 10.30495/tfss.2022.1959857.1034 Open Access Article Abstract Page Full-Text 2 - Fuzzy Subgroups and Digraphs Induced by Fuzzy Subgroups Paul J. Allen Joseph Neggers Hee Sik Kim 10.30495/tfss.2022.690699 Open Access Article Abstract Page Full-Text 3 - Combined Product of Two RL-graphs and It’s Applications Mohammad Mehdi Zahedi Elham Raisi Sarbizhan 10.30495/tfss.2023.1979541.1064 Open Access Article Abstract Page Full-Text 4 - Proposing a Conceptual Model of Critical Success Factors in Lean Production Using Interpretive Structural Modeling and Fuzzy MICMAC Analysis Mazdak Khodadadi Karimvand Hadi Shirouyehzad Farhad Hosseinzadeh Lotfi 10.30495/tfss.2023.1999063.1087