@Misc{BVMC:234097, author = {Creo Rodríguez, Martín}, title = {El sistema de coordenadas en LSE}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2006}, year = {2006}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcjq0w8} }