@article{CRMATH_2010__348_13-14_721_0,
     author = {Burgdorf, Sabine and Klep, Igor},
     title = {Trace-positive polynomials and the quartic tracial moment problem},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {721--726},
     publisher = {Elsevier},
     volume = {348},
     number = {13-14},
     year = {2010},
     doi = {10.1016/j.crma.2010.06.005},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2010.06.005/}
}