@article{CLTM_2006_2006_1_a8,
     author = {Kolountzakis, Mihail N. and Matolcsi, M\'at\'e},
     title = {Matrices de {Hadamard} complejas y la conjetura del conjunto espectral.},
     journal = {Collectanea mathematica},
     pages = {281-291},
     publisher = {mathdoc},
     volume = {57},
     number = {Extra},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_2006_2006_1_a8/}
}