@article{DuranDCisnerosCVargasV1992,
  author    = {Angel Dur{\´a}n D. and Antonio E. Cisneros C. and Agust{\´i}n Vargas V.},
  title     = {Evaluaci{\´o}n briol{\´o}gica de los efectos de la contaminaci{\´o}n atmosf{\´e}rica en la Ciudad de M{\´e}xico},
  journal   = {Tropical bryology},
  number    = {6},
  pages     = {71 -- 82},
  year      = {1992},
}