Opinion Mining from Online Travel Reviews: An Exploratory Investigation on Pakistan Major Online Travel Services Using Natural Language Processing. - Bushra Kanwal; Saif Ur Rehman; Azhar Imran; Rana Saud Shaukat; Jianqiang Li 002; Abdulkareem Alzahrani; Ans D. Alghamdi; Fawaz Khaled Alarfaj (IEEE Access, 2023)