@article{CM_1940__7__1_0,
     author = {Behrend, Felix},
     title = {\"Uber {Systeme} reeller algebraischer {Gleichungen}},
     journal = {Compositio Mathematica},
     pages = {1--19},
     publisher = {Johnson Reprint Corporation},
     volume = {7},
     year = {1940},
     zbl = {0021.29301},
     language = {de},
     url = {http://archive.numdam.org/item/CM_1940__7__1_0/}
}