Biancamaria Della Vecchia Giuseppe Mastroianni József Szabados Weighted approximation of functions on the real line by Bernstein polynomials. 223-239 2004 127 Journal of Approximation Theory 2 http://dx.doi.org/10.1016/j.jat.2004.03.004 db/journals/jat/jat127.html#VecchiaMS04