@article{ELA_2009__18__a36,
     author = {Afshin, Hamid Reza and Mehrjoofard, Mohammad Ali and Salemi, Abbas},
     title = {Polynomial numerical hulls of order 3},
     journal = {The electronic journal of linear algebra},
     pages = {253--263},
     publisher = {mathdoc},
     volume = {18},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__18__a36/}
}