@article{10_4064_fm198_1_2,
     author = {A. Dolich and P. Speissegger},
     title = {An ordered structure of rank two
related to {Dulac's} {Problem}},
     journal = {Fundamenta Mathematicae},
     pages = {17--60},
     publisher = {mathdoc},
     volume = {198},
     number = {1},
     year = {2008},
     doi = {10.4064/fm198-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm198-1-2/}
}