Links:
[1] http://www.ccra-adrc.gc.ca/taxcredit/sred/publications/sr200102-e.html
[2] http://www.ccra-adrc.gc.ca/taxcredit/sred/publications/sr9801t-e.html
[3] http://www.ccra-adrc.gc.ca/taxcredit/sred/publications/sr9609r-e.html
[4] http://www.ccra-adrc.gc.ca/taxcredit/sred/publications/ap9608-e.html