@book{hertzberg_ki_2007,
 title = {{KI} 2007: Advances in Artificial Intelligence},
 publisher = {Springer-Verlag},
 year = {2007},
 editor = {Hertzberg, Joachim and Beetz, Michael and Englert, Roman},
 volume = {4667},
 series = {Lecture Notes in Artificial Intelligence},
 address = {Berlin Heidelberg},
 month = {aug},
}

@book{hertzberg_ki_2007,
 title = {{KI} 2007: Advances in Artificial Intelligence},
 publisher = {Springer-Verlag},
 year = {2007},
 editor = {Hertzberg, Joachim and Beetz, Michael and Englert, Roman},
 volume = {4667},
 series = {Lecture Notes in Artificial Intelligence},
 address = {Berlin Heidelberg},
 month = {aug},
}