@article{JEMS_2005_7_1_a1,
     author = {Carel Faber and Rahul Pandharipande},
     title = {Relative maps and tautological classes},
     journal = {Journal of the European Mathematical Society},
     pages = {13--49},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2005},
     doi = {10.4171/jems/20},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/20/}
}