TY - JOUR A1 - Decoupes, R. A1 - Kafando, R. A1 - Roche, M. A1 - Teisseire, M. T1 - H-TFIDF: What makes areas specific over time in the massive flow of tweets related to the covid pandemic? JO - AGILE GIScience Ser. J1 - AGILE-GISS VL - 2 SP - 2 EP - Y1 - 2021/06/04 PB - Copernicus Publications SN - 2700-8150 UR - https://agile-giss.copernicus.org/articles/2/2/2021/ L1 - https://agile-giss.copernicus.org/articles/2/2/2021/agile-giss-2-2-2021.pdf DO - 10.5194/agile-giss-2-2-2021 ER -