shahrivar ghuzullo,J. , , Shekarian,Y. , , Rezai,B. , , Monemi motlagh,F. , and Aslani,M. R. . "A study of modeling between surface roughness and work index for Barite, pyrite and quartz", Amirkabir Journal of Civil Engineering, 47, 2, 2015, 81-89. doi: 10.22060/ceej.2015.560