00593cam 2200217 450 1984935http://id.bnportugal.gov.pt/bib/porbase/198493520030519115200.00-521-42668-593165PTBN0069597819931220d1993 k y0pory0103 baengGBSquaresCambridgeCambridge University Press1993XII, 286 pLondon Mathematical Society lecture note series171511.342medeng1536230RajwadeA. R.1536589PTBNRPC11E/RAJcoopUCMAmq3078271bccoopUCMA0CMA9-179