Frankenberg-Garcia, Ana2009-11-032009-11-032006-02-282004Ana Frankenberg-Garcia. "COMPARA English Tutorial". 1 September 2008http://hdl.handle.net/10400.26/419http://www.linguateca.pt/superb/busca_publ.pl?idi=1141122282application/pdfengCOMPARAreport