  Let G be an n-vertex graph with m edges. The degree deviation measure of G is
defined as s(G)=sum v in V(G)|degG(v)-(2m/n)|, where n and m are the number of
vertices and edges of G, respectively. The aim of this paper is to prove the
Conjecture 4.2 of [J A de Oliveira, C S Oliveira, C Justel and N M Maia de
Abreu, Measures of irregularity of graphs, Pesq. Oper. 33 (3) (2013) 383-398].
The degree deviation measure of chemical graphs under some conditions on the
cyclomatic number is also computed.
