@article{10_4153_CJM_2009_010_4,
     author = {Marshall, M.},
     title = {Representations of {Non-Negative} {Polynomials,} {Degree} {Bounds} and {Applications} to {Optimization}},
     journal = {Canadian journal of mathematics},
     pages = {205--221},
     year = {2009},
     volume = {61},
     number = {1},
     doi = {10.4153/CJM-2009-010-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2009-010-4/}
}