@article{NSJOM_2003_33_1a_9,
     author = {P. de 

 Lucia and E. Pap},
     title = {Matrix method 

 approach to {Cafiero} theorem},
     journal = {Novi Sad Journal of Mathematics},
     pages = {117-127},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2003_33_1a_9/}
}