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E. M. Harrell and L. Hermi, “On Riesz Means of Eigenvalues,” Communications in Partial Differential Equations, Vol. 36, No. 9, 2011, pp. 1521-1543.
http://dx.doi.org/10.1080/03605302.2011.595865

has been cited by the following article:

• TITLE: Riesz Means of Dirichlet Eigenvalues for the Sub-Laplace Operator on the Engel Group

  AUTHORS: Jingjing Xue

  KEYWORDS: Engel Group; Sub-Laplace Operator; Eigenvalues; Riesz Mean

  JOURNAL NAME: Advances in Pure Mathematics, Vol.3 No.9B, December 24, 2013

  ABSTRACT: In this paper, we are concerned with the Riesz means of Dirichlet eigenvalues for the sub-Laplace operator on the Engel group and deriver different inequalities for Riesz means. The Weyl-type estimates for means of eigenvalues are given.