@article{AIF_1966__16_2_167_0,
     author = {Loeb, Peter},
     title = {An axiomatic treatment of pairs of elliptic differential equations},
     journal = {Annales de l'Institut Fourier},
     pages = {167--208},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {16},
     number = {2},
     year = {1966},
     doi = {10.5802/aif.240},
     mrnumber = {37 #3039},
     zbl = {0172.15101},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.240/}
}