@article{RCP25_1970__11__A3_0,
     author = {Loeffel, J. J. and Martin, A.},
     title = {Propri\'et\'es analytiques des niveaux de l'oscillateur anharmonique et convergence des approximants de {Pade}},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:3},
     pages = {1--22},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {11},
     year = {1970},
     language = {fr},
     url = {http://www.numdam.org/item/RCP25_1970__11__A3_0/}
}