Sums of squares in planar Nash rings.
Efroymson, Gustave A.
Pacific J. Math., Tome 97 (1981) no. 2, p. 75-79 / Harvested from Project Euclid
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Publié le : 1981-05-14
Classification:  12D99,  10C04,  13B02,  14G30,  32B99 
@article{1102734655,
     author = {Efroymson, Gustave A.},
     title = {Sums of squares in planar Nash rings.},
     journal = {Pacific J. Math.},
     volume = {97},
     number = {2},
     year = {1981},
     pages = { 75-79},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102734655}
}

Efroymson, Gustave A. Sums of squares in planar Nash rings.. Pacific J. Math., Tome 97 (1981) no. 2, pp.  75-79. http://gdmltest.u-ga.fr/item/1102734655/