Common Sense Problem Page  
   Corpus of challenging problems for the representation of commonsense knowledge.
   http://www-formal.Stanford.EDU/leora/cs/

Organizing Thoughts into Sequences, Hierarchies, and Networks  
   Presents criteria for defining sequences, hierarchies, and networks (SHN) for organizing thoughts. [A.Kulikauskas and S.Maskeliunas, 1999]
   http://www.ms.lt/ms/projects/structurekinds/paper052499.html

What is a Knowledge Representation?  
   An introductory critical paper by R. Davis, H. Shrobe, and P. Szolovits in AI Magazine - 1993
   http://medg.lcs.mit.edu/ftp/psz/k-rep.html

Enabling Technology For Knowledge Sharing  
   An article published in AI Magazine in 1991, describing ontology-driven knowledge base architectures.
   http://www.isi.edu/isd/KRSharing/vision/AIMag.html

Networked Knowledge Representation and Exchange using UML and RDF  
   Proposes the use of the Unified Modeling Language for modelling ontologies for Web resources and the knowledge contained within them. [S.Cranefield, 2001, Journal of Digital information]
   http://jodi.ecs.soton.ac.uk/Articles/v01/i08/Cranefield/

Knowledge Engineering Part A  
   Lecture notes on knowledge representation, featuring philosophical and psychological basis, conceptual graphs, reasoning and computation. Dickson Lukose, The University of New England, July 1996.
   http://pages.cpsc.ucalgary.ca/~kremer/courses/CG/CGlecture_notes.html