@article{NSJOM_1992_22_1a_6,
     author = {Stojakovi\'c Zoran},
     title = {Dihedral {Quadruple} 

 systems},
     journal = {Novi Sad Journal of Mathematics},
     pages = {81-88},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1992_22_1a_6/}
}