@article{CMH_1931__3_138549,
     author = {R. Wavre},
     title = {Sur l'approximation d'ordre n dans la th\'eorie des figures plan\'etaires.},
     journal = {Commentarii mathematici Helvetici},
     pages = {12--21},
     publisher = {mathdoc},
     volume = {3},
     year = {1931},
     zbl = {0001.35701},
     url = {http://geodesic.mathdoc.fr/item/CMH_1931__3_138549/}
}