Chaves, Luiz, Nícollas Silva, Rodrigo Carvalho, Adriano C. M. Pereira, and Leonardo Rocha. "Exploiting the User Activity-Level to Improve the Models’ Accuracy in Point-Of-Interest Recommender Systems." Anais do XXV Simpósio Brasileiro de Multimídia e Web, Rio de Janeiro, 2019. SBC, 2019, pp.341-348.