@article{MikelskisMavanga1999,
  author    = {Mikelskis, Helmut and Mavanga, Gil Gabriel},
  title     = {An experimental ("low cost"/"hands on") optics course for Mosambique},
  year      = {1999},
  language  = {en}
}
@article{Mikelskis1999,
  author    = {Mikelskis, Helmut},
  title     = {Aus dem Leben gegriffen : Farben in der Physik},
  year      = {1999},
  language  = {de}
}
@article{MikelskisMavanga1999,
  author    = {Mikelskis, Helmut and Mavanga, Gil Gabriel},
  title     = {Empirical study of learning optics by pupils and students in Mosambique},
  year      = {1999},
  language  = {en}
}
@article{Mikelskis1999,
  author    = {Mikelskis, Helmut},
  title     = {Empirische Studie {\"u}ber den Einfluss von Lernvoraussetzung und Lernumgebungen auf Lernerfolg},
  isbn      = {3-88064-286-9},
  year      = {1999},
  language  = {de}
}
@article{MikelskisHornSeifert1999,
  author    = {Mikelskis, Helmut and Horn, Martin Erik and Seifert, Silke},
  title     = {Learning physics aided by computer simulations "Optics Phenomena"},
  year      = {1999},
  language  = {en}
}
@article{Mikelskis1999,
  author    = {Mikelskis, Helmut},
  title     = {Learning physics with multimedia},
  year      = {1999},
  language  = {en}
}
@article{MikelskisSeifertRoesler1999,
  author    = {Mikelskis, Helmut and Seifert, Silke and Roesler, Frank},
  title     = {Optik lernen mit der Simulationssoftware phenOpt},
  issn      = {0025-5866},
  year      = {1999},
  language  = {de}
}
@article{Mikelskis1999,
  author    = {Mikelskis, Helmut},
  title     = {Physik lernen mit interaktiver Hypermedia : eine empirische Pilotstudie},
  year      = {1999},
  language  = {de}
}