@Misc{BVMC:232618, author = {Ruiz Gurillo, Leonor}, author = {Timofeeva, Larissa}, title = {El siglo XX y perspectivas para el siglo XXI}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2006}, year = {2006}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc9c7b0} }