@article{NSJOM_2005_35_1a_6,
     author = {L. Z. Ran\v{c}i\'c and M. S. Petkovi\'c},
     title = {Square-root families for the simultaneous approximation of polynomial multiple 

 zeros},
     journal = {Novi Sad Journal of Mathematics},
     pages = {59-70},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2005_35_1a_6/}
}