@inproceedings{KlinCALCO05,
  author    = {Bartek Klin},
  title     = {The Least Fibred Lifting and the Expressivity of Coalgebraic
               Modal Logic},
  booktitle = {Procs. CALCO},
  year      = {2005},
  pages     = {247-262},
  ee        = {http://dx.doi.org/10.1007/11548133_16},
  series    = {Lecture Notes in Computer Science},
  volume    = {3629}
}