1. On the enrichment of tourmaline in metamorphic sediments of the Arzberg Series, W. Germany (NE Bavaria);Abraham;Neues Jahrbuch Mineralogie Monatshefte,1972
2. Geology and mineralization of Wadi Sikait area, south-Eastern Desert, Egypt;Basta;Journal Geology United Arab Republic,1961
3. Phase relations of tourmaline leucogranites and the significance of tourmaline in silicic magmas;Benard;Journal Geology,1985
4. Vector representation of tourmaline compositions;Burt;American Mineralogist,1989
5. Rock-forming minerals;Deer,1997