@techreport{HoefnerMoeller2010,
  author    = {Peter H{\"o}fner and Bernhard M{\"o}ller},
  title     = {An extension for feature algebra},
  institution = {Fakult{\"a}t f{\"u}r Angewandte Informatik},
  series    = {Reports / Technische Berichte der Fakult{\"a}t f{\"u}r Angewandte Informatik der Universit{\"a}t Augsburg},
  number    = {2010-09},
  year      = {2010},
}