@book{Hufnagel2011,
  author    = {Hufnagel, W.},
  title     = {Management unterst{\"u}tztes Controlling, LE1 - LE 4},
  address   = {M{\"u}nster},
  year      = {2011},
  language  = {mul}
}
@article{HufnagelZeidler2010,
  author    = {Hufnagel, W. and Zeidler, St.},
  title     = {Die Geb{\"a}udebewertung im Rahmen der Erstbilanzierung in Niedersachsen zur Umsetzung des NKR},
  series = {Der Gemeindehaushalt},
  journal   = {Der Gemeindehaushalt},
  number    = {1},
  pages     = {11 -- 14},
  year      = {2010},
  language  = {de}
}
@article{HufnagelToennissen2010,
  author    = {Hufnagel, W. and T{\"o}nnissen, St.},
  title     = {IT - Governance, Interne Revision, CoBiT, BilMoG - Entwicklung eines Modells zur Pr{\"u}fung der IT - Governance in Anlehnung an den Standard CoBiT},
  series = {Zeitschrift Interne Revision},
  journal   = {Zeitschrift Interne Revision},
  number    = {3},
  pages     = {110 -- 118},
  year      = {2010},
  language  = {de}
}
@book{Hufnagel2010,
  author    = {Hufnagel, W.},
  title     = {Einf{\"u}hrung in die Buchf{\"u}hrung und Bilanzierung. Buchungen im Handels- und Industriebetrieb, Grundlagen des handels- und steuerrechtlichen Jahresabschlusses, {\"U}berblick {\"u}ber die Jahresabschlussanalyse und IFRS},
  edition   = {5},
  publisher = {Herne},
  address   = {B},
  isbn      = {978-3-482-538},
  year      = {2010},
  language  = {de}
}
@book{Hufnagel2010,
  author    = {Hufnagel, W.},
  title     = {Managementsysteme, LE 1},
  address   = {Hagen},
  year      = {2010},
  language  = {mul}
}
@book{HufnagelRueth2010,
  author    = {Hufnagel, W. and R{\"u}th, D.},
  title     = {Internes Rechnungswesen, LE 1-5},
  address   = {Hagen},
  year      = {2010},
  language  = {mul}
}
@book{HufnagelHoldt2009,
  author    = {Hufnagel, W. and Holdt, W.},
  title     = {Einf{\"u}hrung in die Buchf{\"u}hrung und Bilanzierung. Buchungen im Handels- und Industriebetrieb, Grundlagen des handels- und steuerrechtlichen Jahresabschlusses, {\"U}berblick {\"u}ber die Jahresabschlussanalyse und IFRS},
  edition   = {4},
  publisher = {Herne},
  address   = {Berlin},
  isbn      = {978-3-482-538},
  year      = {2009},
  language  = {de}
}
@book{Hufnagel2009,
  author    = {Hufnagel, W.},
  title     = {Managementsysteme, LE1},
  address   = {Hagen},
  year      = {2009},
  language  = {mul}
}
@book{HufnagelKuehn2009,
  author    = {Hufnagel, W. and K{\"u}hn, R.},
  title     = {Betriebliches Rechnungswesen, Externes Rechnungswesen, LE 1-4},
  address   = {Hagen},
  year      = {2009},
  language  = {mul}
}
@book{HufnagelBurgfeldSchaecher2008,
  author    = {Hufnagel, W. and Burgfeld-Sch{\"a}cher, B.},
  title     = {Investitions- und Finanzierungsmodelle, LE 1-4},
  address   = {Hagen},
  year      = {2008},
  language  = {de}
}