Jech89'

BibTeX

@article{DBLP:journals/jsyml/Jech89,
  author    = {Thomas Jech},
  title     = {Positive sum Operations on Ordinals and Normal Filters on
               Greatly Mahlo Cardinals},
  journal   = {J. Symb. Log.},
  volume    = {54},
  number    = {1},
  year      = {1989},
  pages     = {226-233},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}