@ARTICLE{publication1, title = "A characterization theorem for semi-classical orthogonal polynomials on non-uniform lattices", author = "{BRANQUINHO, Am{\ยด{i}}lcar} and {CHEN, Yang} and {FILIPUK, Galina} and {REBOCHO, Maria das Neves}", year = "2018", abstract = " ", journal = "Applied Mathematics and Computation", volume = "334", pages = "356-366" }