GreedEx: A visualization tool for experimentation and discovery learning of greedy algorithms Egileak: J. Velázquez-Iturbide, O. Debdi, N. Esteban-Sánchez, C. Pizarro Urtea: 2013 Aldizkaria: IEEE Transactions on learning technologies Informazio gehigarria http://www.computer.org/csdl/trans/lt/2013/02/tlt2013020130-abs.html