@article{10_4064_fm_157_2_3_191_207,
     author = {Alexandra Fronville and Anton P.  Sadovski and Henryk \.Zo{\l}\k{a}dek},
     title = {Solution of the $1 : {\ensuremath{-}}2$ resonant center problem in the quadratic case},
     journal = {Fundamenta Mathematicae},
     pages = {191--207},
     publisher = {mathdoc},
     volume = {157},
     number = {2},
     year = {1998},
     doi = {10.4064/fm-157-2-3-191-207},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-157-2-3-191-207/}
}