You might find some useful papers in the SAS Global Forum proceedings. You can search here: http://support.sas.com/events/sasglobalforum/previous/online.html When I search for "proc cluster" I get 7 papers: http://support.sas.com/dsearch?qt=%22proc+cluster%22&style=sup&image2.x=11&image2.y=8&nh=40&qc=suppprd&ws=1&qm=1&st=1&lk=1&rf=0&oq=&rq=0&col=suppprd&ct=547893596
... View more