Logic and Sachverhalte Logic and Sachverhalte: Article by Barry Smith, discussing a view of logic which sees it as the science of states of affairs (Sachverhalte). (Logic and Ontology) http://wings.buffalo.edu/academic/department/philosophy/faculty/smith/articles/logsvh.html
Logic and Formal Ontology Logic and Formal Ontology: Article by Barry Smith discussing Husserl's Logical Investigations. (Logic and Ontology) http://wings.buffalo.edu/philosophy/faculty/smith/articles/lfo.html
Meaning and the Problem of Universals Meaning and the Problem of Universals: Subtitled a `Kantian-Friesian approach', an article by Kelley L. Ross. A nice historical survey of the problem of universal, but a bit weak on particular theories (eg. Frege). (Logic and Ontology) http://www.friesian.com/universl.htm