@article{GAU_1975-1976__3_2_A7_0,
     author = {Bertrand, Daniel},
     title = {Lemmes de {Schwarz} et lemmes d'approximations dans les domaines ultram\'etriques},
     journal = {Groupe de travail d'analyse ultram\'etrique},
     note = {talk:J8},
     pages = {J1--J12},
     publisher = {Secr\'etariat math\'ematique},
     volume = {3},
     number = {2},
     year = {1975-1976},
     language = {fr},
     url = {http://www.numdam.org/item/GAU_1975-1976__3_2_A7_0/}
}