Smith, S. R., Foster, G. L., Romer, R. L., Tindle, A. G., Kelley, S. P., Noble, S. R., Horstwood, M., Breaks, F. W. (2004): U-Pb columbite-tantalite chronology of rare-element pegmatites using TIMS and Laser Ablation – Multi Collector – ICP – MS. - Contributions to Mineralogy and Petrology, 147, 5, 549-654.https://doi.org/10.1007/s00410-003-0538-y