TY - JOUR AU - Achille Achache TI - Join-closed subsets of an ordered set. Unicity of the join-basis JO - Novi Sad Journal of Mathematics PY - 2014 SP - 1 EP - 7 VL - 44 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NSJOM_2014_44_1a_0/ ID - NSJOM_2014_44_1a_0 ER -