@article{307,
  author = {E. Baron and D. Branch and Peter Hauschildt and Alexei Filippenko and R. Kirshner and P. Challis and S. Jha and R. Chevalier and Claes Fransson and P. Lundqvist and Peter Garnavich and B. Leibundgut and Richard McCray and E. Michael and N. Panagia and M. Phillips and C. Pun and Brian Schmidt and G. Sonneborn and N. Suntzeff and L. Wang and J. Wheeler},
  title = {Preliminary Spectral Analysis of the Type II Supernova 1999em},
  year = {2000},
  journal = {The Astrophysical Journal},
  volume = {545},
  pages = {444-448},
  month = {Oct-12-2000},
  issn = {0004-637X},
  doi = {10.1086/317795},
}