@article{DBLP:journals/jct/ThasM00,
  author    = {Joseph A. Thas and
               Hendrik Van Maldeghem},
  title     = {Classification of Embeddings of the Flag Geometries of Projective
               Planes in Finite Projective Spaces, Part 1},
  journal   = {J. Comb. Theory, Ser. A},
  volume    = {90},
  number    = {1},
  year      = {2000},
  pages     = {159-172},
  ee        = {http://dx.doi.org/10.1006/jcta.1999.3023},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}