Siyeong Yun Woojin Cho Chulhyun Kim Sungjoo Lee Technological trend mining: identifying new technology opportunities using patent semantic analysis. 102993 2022 59 Inf. Process. Manag. 4 https://doi.org/10.1016/j.ipm.2022.102993 db/journals/ipm/ipm59.html#YunCKL22