%0 Journal Article %A Aubin, Jean-Pierre %T Abstract boundary-value operators and their adjoints %J Rendiconti del Seminario Matematico della Università di Padova %D 1970 %P 1-33 %V 43 %I Seminario Matematico of the University of Padua %U http://www.numdam.org/item/RSMUP_1970__43__1_0/ %G en %F RSMUP_1970__43__1_0