http://sw-eng.falls-church.va.us/AdaIC
http://lglwww.epfl.ch/Ada/LRM/9X/rm9x/rm9x-toc.html
http://cuiwww.unige.ch/db-research/Enseignement/analyseinfo/Ada95/BNFindex.html
http://www.software.org
http://turing.scs.carleton.ca/~csgs/resources/scheme_intro.html
http://www.cs.indiana.edu/scheme-repository/home.html