@article{JAC_2006__23_3_a1,
     author = {Ball, Simeon and Lavrauw, Michel},
     title = {On the graph of a function in two variables over a finite field},
     journal = {Journal of Algebraic Combinatorics},
     pages = {243--253},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2006__23_3_a1/}
}