1. Ratajeski, K.: Atlas of Igneous and Metamorphic Rocks, Minerals & Textures,
http://www.geolab.unc.edu/Petunia/IgMetAtlas/mainmenu.html
2. Roanes Lozano, E., Roanes Macías, E., Laita, L.M.: An accelerated-time simulation of departing passengers’ flow in airport terminals. Math. Comp. Simul. 67, 163–172 (2004)
3. Grabmeier, J., Kaltofen, E., Weispfenning, V. (eds.): Computer Algebra Handbook. Foundations. Applications. Systems. Springer, Berlin (2003)
4. http://www.maplesoft.com/academic/teaching/index.asp
5. Lecture Notes in Artificial Intelligence;E. Roanes-Lozano,2004