@article{PIM2_1983__33(47)_257631,
     author = {Heiberg, C.H.},
     title = {Level sets of polynomials in several real variables.},
     journal = {Publications de l 'Institut Math\'ematique. Nouvelle S\'erie},
     pages = {83},
     publisher = {mathdoc},
     volume = {33(47)},
     year = {1983},
     zbl = {0557.31003},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/PIM2_1983__33(47)_257631/}
}