Ze-Han FangCHIEN CHIN CHEN2018-09-102018-09-102016http://www.sciencedirect.com/science/article/pii/S0167923616300847http://scholars.lib.ntu.edu.tw/handle/123456789/399107A novel trend surveillance system using the information from web search enginesjournal articlehttps://doi.org/10.1016/j.dss.2016.06.001