@article{10_4153_CJM_1990_011_2,
     author = {Li, Chengzhi and Rousseau, Christiane},
     title = {Codimension 2 {Symmetric} {Homoclinic} {Bifurcations} and {Application} to 1:2 {Resonance}},
     journal = {Canadian journal of mathematics},
     pages = {191--212},
     year = {1990},
     volume = {42},
     number = {2},
     doi = {10.4153/CJM-1990-011-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-011-2/}
}