Discrete Structures: Relations
https://cse.buffalo.edu/~rapaport/191/relations.html
25 Aug 2009:
PleaseFeigenbaum, Lee; Herman, Ivan; Hongsermeier, Tonya; Neumann, Eric; & Stephens, Susie (2007), "The Semantic Web in Action", Scientific American 297(6) (December): 90-97.