@article{vout:cate08,
  author	= {George Voutsadakis},
  title		= {Categorical Abstract Algebraic Logic: Equivalential $\pi$-Institutions},
  journal	= {The Australasian Journal of Logic},
  year		= 2008,
  volume	= 6,
  pages		= {1--24},
  URL		= {http://www.philosophy.unimelb.edu.au/ajl/2008/},
}