15-16, Freeman, ISBN 0-7167-2438-3*Guilbert, John M., and Park, Charles F., Jr. (1986) "The Geology of Ore Deposits", Freeman, ISBN 0-7167-1456-6
==Sklici====Viri==* Blatt, Harvey in Robert J. Tracy, 1996, "Petrology: Igneous, Sedimentary and Metamorphic", 2. izdaja, str.