@article{NSJOM_1980_10_Nonea_23,
     author = {\v{C}upona Georgi and Vojvodi\'c 

 Gradimir and Sini\v{s}a Crvenkovi\'c},
     title = {Subalgebras of semilattices},
     journal = {Novi Sad Journal of Mathematics},
     pages = {191-195},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_23/}
}