Farrús, Mireia, and Marta R. Costa-jussà. “Automatic Evaluation for E-Learning Using Latent Semantic Analysis: A Use Case”. The International Review of Research in Open and Distributed Learning 14, no. 1 (March 1, 2013): 239-254. Accessed June 14, 2021. http://www.irrodl.org/index.php/irrodl/article/view/1389.