@article{AIF_1981__31_3_115_0, author = {Yger, Alain}, title = {Fonctions d\'efinies dans le plan et v\'erifiant certaines propri\'et\'es de moyenne}, journal = {Annales de l'Institut Fourier}, pages = {115--146}, publisher = {Institut Fourier}, address = {Grenoble}, volume = {31}, number = {3}, year = {1981}, doi = {10.5802/aif.841}, zbl = {0438.43010}, mrnumber = {84e:39005}, language = {fr}, url = {https://aif.centre-mersenne.org/articles/10.5802/aif.841/} }