@article{DeneckeLeeratanavalee1999,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {Weak hypersubstitutions and weakly derived algebras},
  year      = {1999},
  language  = {en}
}
@article{DeneckeLeeratanavalee2003,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {Tree transformations defined by generalized hypersubstitutions},
  year      = {2003},
  language  = {en}
}
@article{DeneckeLeeratanavalee2003,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {The Semantical Kernel of a Generalized Hypersubstitution},
  year      = {2003},
  language  = {en}
}
@article{DeneckeLeeratanavalee2001,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {M-solid polynomial varieties of semigroups},
  year      = {2001},
  language  = {en}
}
@article{DeneckeLeeratanavalee2000,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {Generalized hypersubstitutions and strongly solid varieties},
  isbn      = {3-8265- 7983-6},
  year      = {2000},
  language  = {en}
}
@article{DeneckeLeeratanavalee2000,
  author    = {Denecke, Klaus-Dieter and Leeratanavalee, Sorasak},
  title     = {Solid polynomial varieties of semigroups which are definable by identities},
  year      = {2000},
  language  = {en}
}