@article{CMH_1959__33_139163,
     author = {J. Delsarte and J.L. Lions},
     title = {Moyennes g\'en\'eralis\'ees.},
     journal = {Commentarii mathematici Helvetici},
     pages = {59--69},
     year = {1959},
     volume = {33},
     url = {http://geodesic.mathdoc.fr/item/CMH_1959__33_139163/}
}