@article{ELA_2009__19__a4,
     author = {Handelman, David},
     title = {Matrices of positive polynomials},
     journal = {The electronic journal of linear algebra},
     pages = {2--89},
     publisher = {mathdoc},
     volume = {19},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__19__a4/}
}