Electronic Journal of Differential Equations, Vol. 2009(2009), No. 135, pp. 1-11. Title: Some inequalities for Sobolev integrals Authors: Nikolaj Dimitrov (Univ. of Rousse, Bulgaria) Stepan Tersian (Univ. of Rousse, Bulgaria) Abstract: We present some inequalities for Sobolev integrals for functions of one variable which are generalization of Dirichlet principle for harmonic functions. Submitted February 8, 2009. Published October 21, 2009. Math Subject Classifications: 26D10, 34A40. Key Words: Sobolev integrals; Dirichlet principle; divided differences; Hermite polynomials.