@ARTICLE{NLE2018,
AUTHOR = {Sabine GrĂ¼nder-Fahrer, Antje Schlaf, Gregor Weidemann, Gerhard Heyer},
TITLE = {Topics and Topical Phases in German Social Media Communication during a Disaster},
JOURNAL = {Natural Language Engineering},
YEAR = {2018},
VOLUME = {24},
PAGES = {221-264}
}