@article{DOCMA_2014__19__a39,
     author = {Xie, Heng},
     title = {An application of {Hermitian} {K-theory:} sums-of-squares formulas},
     journal = {Documenta mathematica},
     pages = {195--208},
     publisher = {mathdoc},
     volume = {19},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a39/}
}