@article{10_4153_CJM_2000_027_1,
     author = {Ou, Zhiming M. and Williams, Kenneth S.},
     title = {Small {Solutions} of \ensuremath{\varphi} 1 x 1 2 + . . . + \ensuremath{\varphi} n xn 2 = 0},
     journal = {Canadian journal of mathematics},
     pages = {613--632},
     year = {2000},
     volume = {52},
     number = {3},
     doi = {10.4153/CJM-2000-027-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-027-1/}
}