@article{CRMATH_2003__336_8_619_0,
     author = {Lo{\"\i}c Teyssier},
     title = {Analytical classification of saddle-node vector fields},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {619--624},
     publisher = {Elsevier},
     volume = {336},
     number = {8},
     year = {2003},
     doi = {10.1016/S1631-073X(03)00134-1},
     language = {en},
}