A text as unique as a fingerprint: Text analysis and authorship recognition in a Virtual Learning Environment of the Unified Health System in Brazil. - Marcella Andrade da Rocha; Philippi Sedir Grilo de Morais; Daniele Montenegro da Silva Barros; João Paulo Queiroz dos Santos; Sara Dias-Trindade; Ricardo Alexsandro de Medeiros Valentim (Expert Syst. Appl., 2022)