@article{GAU_1984-1985__12_1_A5_0,
     author = {Robba, Philippe},
     title = {Produit symm\'etrique de l'\'equation de {Bessel}},
     journal = {Groupe d'\'etude d'analyse ultram\'etrique},
     note = {talk:7},
     pages = {1--3},
     year = {1984-1985},
     publisher = {Secr\'etariat math\'ematique},
     volume = {12},
     number = {1},
     zbl = {0582.12013},
     language = {fr},
     url = {https://www.numdam.org/item/GAU_1984-1985__12_1_A5_0/}
}