%0 Journal Article %A Loeb, Peter %T An axiomatic treatment of pairs of elliptic differential equations %J Annales de l'Institut Fourier %D 1966 %P 167-208 %V 16 %N 2 %I Institut Fourier %C Grenoble %U http://archive.numdam.org/articles/10.5802/aif.240/ %R 10.5802/aif.240 %G en %F AIF_1966__16_2_167_0