@article{ASENS_1988_4_21_3_455_0,
     author = {Cornalba, Maurizio and Harris, Joe},
     title = {Divisor classes associated to families of stable varieties, with applications to the moduli space of curves},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {455--475},
     publisher = {Elsevier},
     volume = {Ser. 4, 21},
     number = {3},
     year = {1988},
     doi = {10.24033/asens.1564},
     mrnumber = {89j:14019},
     zbl = {0674.14006},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1564/}
}