Loires Diniz Trujillo, G. e Pupatto Ruano, B. 2017. FACE-TO-FACE TANDEM AS LANGUAGE LEARNING AND SOCIAL INTEGRATION FOR STUDENTS OF PORTUGUESE AS A FOREIGN LANGUAGE AT CELIN UFPR, BRAZIL. Revista X. 12, 2 (dez. 2017). DOI:https://doi.org/10.5380/rvx.v12i2.51132.