@article{NSJOM_2014_44_1a_0,
     author = {Achille Achache},
     title = {Join-closed subsets of an ordered set.

 {Unicity} of the join-basis},
     journal = {Novi Sad Journal of Mathematics},
     pages = {1-7},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2014_44_1a_0/}
}