@article{KJM_2001_23_1_a3,
     author = {Gradimir V. Milovanovi\'c and Miodrag M. Spalevi\'c},
     title = {A note on density of the zeros of sigma-orthogonal polynomials},
     journal = {Kragujevac Journal of Mathematics},
     pages = {37 - 43},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/KJM_2001_23_1_a3/}
}