O. A. Santana e L. R. T. Peixoto, “<b>Student perspectives about mobile learning initiatives at Open University of Brazil: the mobile phone issue</b&gt; - doi: 10.4025/actascieduc.v32i2.11545”, Acta Sci. Educ., vol. 32, nº 2, p. 219-223, dez. 2010.