http://www.earlham.edu/~peters/writing/acrl.htm. 

http://www.alpsp.org.uk/s130902.htm

http://www.inist.fr/openaccess/en/comsci_impliprojets.php

http://www.neci.nec.com/~lawrence/papers/online-nature01/

http://isacco.ingentaselect.com/vl=23512232/cl=62/nw=1/rpsv/cgi-bin/linker?ini=alpsp&reqidx=/catchword/alpsp/09531513/v15n4/s6/p279

http://isacco.ingentaselect.com/vl=23512232/cl=62/nw=1/rpsv/cgi-bin/linker?ini=alpsp&eqidx=/catchword/alpsp/09531513/v15n4/s13/p315

http://www.soros.org/openaccess/oajguides/index.shtml