@article{NSJOM_1991_21_2a_1,
     author = {Kurili\'c 

 Milo\v{s}},
     title = {The nucleus of a lattice},
     journal = {Novi Sad Journal of Mathematics},
     pages = {13-21},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1991_21_2a_1/}
}