Viana, F L, Sandra  Santos, Iolanda  Ribeiro, Séli  Chaves-Sousa, Sara  Brandão, Irene  Cadime, and José  Maia. ?Listening Comprehension Assessment: Validity Studies Of Two Vertically Scaled Tests For Portuguese Students.?. Universitas Psychologica 14, no. 1. Universitas Psychologica (2015): 345-354.

Viana, F L, Sandra  Santos, Iolanda  Ribeiro, Séli  Chaves-Sousa, Sara  Brandão, Irene  Cadime, and José  Maia. ?Listening Comprehension Assessment: Validity Studies Of Two Vertically Scaled Tests For Portuguese Students?. Universitas Psychologica 14. Universitas Psychologica (2014). doi:10.11144/javeriana.upsy14-1.lcav.