@article{ELA_2010__20__a25,
     author = {Chien, Mao-Ting and Nakazato, Hiroshi},
     title = {The q-numerical range of {3X3} tridiagonal matrices},
     journal = {The electronic journal of linear algebra},
     pages = {376--390},
     publisher = {mathdoc},
     volume = {20},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2010__20__a25/}
}