Pereira, I., Coelho, I. L. and Loregian-Penkal, L. (2016) “Variation in verbal agreement of ‘nós’ in the present and past tense in regular verbs of the 1st and 2nd conjugation: productive in Southeast of Paraná?”, Signótica. Goiânia, 28(2), pp. 481–508. doi: 10.5216/sig.v28i2.41083.