@article{10_1023_A_1022950819918,
     author = {B\"ohmer, Klaus and Janovsk\'a, Drahoslava and Janovsk\'y, Vladim{\'\i}r},
     title = {Computing the differential of an unfolded contact diffeomorphism},
     journal = {Applications of Mathematics},
     pages = {3--30},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2003},
     doi = {10.1023/A:1022950819918},
     mrnumber = {1954501},
     zbl = {1099.34007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1023/A:1022950819918/}
}