@article{articlef316abda,
title   = {Online learning: audio or text?},
author = {Oliveira Neto, José Dutra de and Huang, Wenhao David and Melli, Nádia Cristina de Azevedo},
year = {2015},
doi = {10.1007/s11423-015-9392-7},
journal   = {Educational Technology Research and Development}
}