Text and Data Mining valid from 2018-08-24
Received: 2 March 2018
Accepted: 5 August 2018
First Online: 24 August 2018
: Bruno Requião da Cunha is a Federal Police Officer and took part as an investigator in some of the operations that composed the analyzed network.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.