doi:10.1007/s00009-015-0552-0engAbadias, L.Miana, P. J.Romero, N.Quadrature Rules for L1-Weighted Norms of Orthogonal PolynomialsART-2015-91079In this paper, we obtain L 1-weighted norms of classical orthogonal polynomials (Hermite, Laguerre and Jacobi polynomials) in terms of the zeros of these orthogonal polynomials; these expressions are usually known as quadrature rules. In particular, these new formulae are useful to calculate directly some positive defined integrals as several examples show.2015http://zaguan.unizar.es/record/4813110.1007/s00009-015-0552-0http://zaguan.unizar.es/record/48131oai:zaguan.unizar.es:48131Mediterranean Journal of Mathematics 13, 3 (2015), 1291-1306by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess