Roustakiani, Azadeh , Abdolvand, Neda, Rajaei Harandi, Saeideh (2018) ‘An Improved Sentiment Analysis Algorithm based on Appraisal Theory and Fuzzy Logic’, Journal of Information Systems and Telecommunication (JIST) , 6(22), pp. 88-94. doi:10.7508/jist.2018.02.004