@article{AIF_1983__33_3_121_0,
     author = {Spring, David},
     title = {Convex integration of non-linear systems of partial differential equations},
     journal = {Annales de l'Institut Fourier},
     pages = {121--177},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {33},
     number = {3},
     year = {1983},
     doi = {10.5802/aif.934},
     zbl = {0507.35019},
     mrnumber = {85i:58126},
     language = {en},
     url = {https://aif.centre-mersenne.org/articles/10.5802/aif.934/}
}