\# Covid-19: An Exploratory Investigation of Hashtag Usage on Twitter

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Petersen K, Gerken JM. \# Covid-19: An Exploratory Investigation of Hashtag Usage on Twitter. Health Policy. 2021.

Petersen, K., & Gerken, J. M. (2021). \# Covid-19: An Exploratory Investigation of Hashtag Usage on Twitter. Health Policy.

Petersen, Kai, und Jan Michael Gerken. 2021. „\# Covid-19: An Exploratory Investigation Of Hashtag Usage On Twitter“. Health Policy. Elsevier.

Petersen, Kai, und Jan Michael Gerken. „\# Covid-19: An Exploratory Investigation Of Hashtag Usage On Twitter“. Health Policy (2021): n. pag. Print.

Petersen, K., und J. M. Gerken. „\# Covid-19: An Exploratory Investigation Of Hashtag Usage On Twitter“. Health Policy, Elsevier, 2021.