%0 Journal Article %A Kurilić, Miloš S. %A Kuzeljević, Boriša %T Positive families and Boolean chains of copies of ultrahomogeneous structures %J Comptes Rendus. Mathématique %D 2020 %P 791-796 %V 358 %N 7 %I Académie des sciences, Paris %U http://www.numdam.org/articles/10.5802/crmath.82/ %R 10.5802/crmath.82 %G en %F CRMATH_2020__358_7_791_0