Is There a Crowd? Experiences in Using Density-Based Clustering and Outlier Detection. - Mohamed Ben Kalifa; Rebeca P. Díaz Redondo; Ana Fernández Vilas; Rafael López Serrano; Sandra Servia Rodríguez (MIKE, 2014)

Why are these people there? An analysis based on Twitter. - Mohamed Ben Kalifa; Rebeca P. Díaz Redondo; Ana Fernández Vilas (IISA, 2015)

Sensing the city with Instagram: Clustering geolocated data for outlier detection. - Daniel Rodríguez Domínguez; Rebeca P. Díaz Redondo; Ana Fernández Vilas; Mohamed Ben Khalifa (Expert Syst. Appl., 2017)

Identifying urban crowds using geo-located Social media data: a Twitter experiment in New York City. - Mohamed Ben Khalifa; Rebeca P. Díaz Redondo; Ana Fernández Vilas; Sandra Servia Rodríguez (J. Intell. Inf. Syst., 2017)

Analysis of crowds' movement using Twitter. - Ana Fernández Vilas; Rebeca P. Díaz Redondo; Mohamed Ben Khalifa (Comput. Intell., 2019)