Source: https://www.researchgate.net/publication/320520607_Normalization_Strategies_for_Enhancing_Spatio-Temporal_Analysis_of_Social_Media_Responses_during_Extreme_Events_A_Case_Study_based_on_Analysis_of_Four_Extreme_Events_using_Socio-Environmental_Data_Exp/fulltext/59e9f642aca272cddddb6c13/Normalization-Strategies-for-Enhancing-Spatio-Temporal-Analysis-of-Social-Media-Responses-during-Extreme-Events-A-Case-Study-based-on-Analysis-of-Four-Extreme-Events-using-Socio-Environmental-Data-Exp.pdf