@article{NSJOM_1999_29_2a_10,
     author = {D. 

 Dimovski and A. Mandak},
     title = {Weighted block designsand {Steiner} systems},
     journal = {Novi Sad Journal of Mathematics},
     pages = {163-169},
     year = {1999},
     volume = {29},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_2a_10/}
}