@article{NSJOM_1991_21_2a_13,
     author = {To\v{s}i\'c 

 Ratko and Stojmenovi\'c Ivan},
     title = {On pairing points in the 

 plane},
     journal = {Novi Sad Journal of Mathematics},
     pages = {157-160},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1991_21_2a_13/}
}