Smith, S. R., Romer, R. L., Breaks, F. W., Kelley, S. P., Trindle, A. G. (2000): Project Unit 98-016. Combined U-Pb columbite and 40Ar/39Ar mica ages from rare-element pegmatites. - In: Summary of Field Work and Other Activities 2000, (Open File report / Ontario Geological Survey; 6032), 24-1-24-9.