@article{AIHPA_1985__43_1_1_0,
     author = {Houard, J. C. and Irac-Astaud, M.},
     title = {Star algebra and {Green} functions of nonlinear differential equations},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {1--27},
     publisher = {Gauthier-Villars},
     volume = {43},
     number = {1},
     year = {1985},
     mrnumber = {813138},
     zbl = {0579.34019},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1985__43_1_1_0/}
}