@article{CM_1940__7__1_0,
author = {Behrend, Felix},
title = {\"Uber Systeme reeller algebraischer Gleichungen},
journal = {Compositio Mathematica},
volume = {7},
year = {1940},
pages = {1-19},
zbl = {0021.29301},
language = {de},
url = {http://dml.mathdoc.fr/item/CM_1940__7__1_0}
}
Behrend, Felix. Über Systeme reeller algebraischer Gleichungen. Compositio Mathematica, Tome 7 (1940) pp. 1-19. http://gdmltest.u-ga.fr/item/CM_1940__7__1_0/