%0 Journal Article %A Ch. C. Pugh %T An Improved closing lemma and a general density theorem %J Matematika %D 1968 %P 136-146 %V 12 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1968_12_6_a7/ %G ru %F MAT_1968_12_6_a7