@incollection{Kowalski:1995,
  added-at = {2007-12-14T02:41:44.000+0100},
  author = {Kowalski, Robert},
  biburl = {http://www.bibsonomy.org/bibtex/2df0f6968a644569232e8f230aff987c2/diego_ma},
  booktitle = {What is a Logical System?},
  editor = {Gabbay, D.},
  interhash = {0402024733906417492643f496373ca6},
  intrahash = {df0f6968a644569232e8f230aff987c2},
  keywords = {logic},
  publisher = {Oxford University Press},
  timestamp = {2007-12-14T02:41:44.000+0100},
  title = {Logic without Model Theory},
  url = {http://www-lp.doc.ic.ac.uk/UserPages/staff/rak/rak.html},
  year = 1995
}