1. The Architecture of Cognition
2. Apaza, R. G., Cervantes, E. V., Quispe, L. C. & Luna, J. O. (2014). Online courses recommendation based on LDA. In J. A. Lossio-Ventura & H. Alastrista-Salas (Eds.),Information management and big data(pp. 42–48). Retrieved from http://ceur-ws.org/Vol-1318/SIMBig2014_proceedings.pdf