@book{ArwornDeneckePoeschel1998,
  author    = {Arworn, Srichan and Denecke, Klaus-Dieter and P{\"o}schel, Reinhard},
  title     = {Closure operators on complete lattices},
  series = {Preprint MATH-ALG / Technische Universit{\"a}t Dresden},
  volume    = {1998, 05},
  journal   = {Preprint MATH-ALG / Technische Universit{\"a}t Dresden},
  publisher = {Techn. Univ.},
  address   = {Dresden},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitz1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg},
  title     = {Finite monoids of hypersubstitutions of type € = (2)},
  year      = {1998},
  language  = {en}
}
@article{DeneckeFreiberg1998,
  author    = {Denecke, Klaus-Dieter and Freiberg, L.},
  title     = {The word problem for M-solid varieties of semigroups},
  isbn      = {981-3083-86-7},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitzMarszalek1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg and Marszalek, R.},
  title     = {Derived varieties and derived equational theories},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitz1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg},
  title     = {M-solid monoids of hypersubstitutions of type 2},
  year      = {1998},
  language  = {en}
}
@article{Denecke1998,
  author    = {Denecke, Klaus-Dieter},
  title     = {Tame congruence theory},
  year      = {1998},
  language  = {en}
}
@article{DomschLueckEisenreich1998,
  author    = {Domsch, Horst and L{\"u}ck, Erika and Eisenreich, Manfred},
  title     = {Description o a soil structure by means of the penetration resistance and the electrical conductivity},
  year      = {1998},
  language  = {en}
}
@article{LueckEisenreich1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred},
  title     = {Geophysical prospections of archaeological sites in Brandenburg},
  year      = {1998},
  language  = {en}
}
@article{HerbstKappKrummeletal.1998,
  author    = {Herbst, R. and Kapp, Ingo and Krummel, H. and L{\"u}ck, Erika},
  title     = {Seismic sources for shallow investigatons : a field comparison from Northern Germany},
  year      = {1998},
  language  = {en}
}
@article{GebertKretzschmarRegenstein1998,
  author    = {Gebert, Horst and Kretzschmar, Wolfgang and Regenstein, Wolfgang},
  title     = {Ground-state complex formation of perylene with pyromellitic dianhydride studied by static fluorescence quenching},
  year      = {1998},
  language  = {en}
}