Unsupported radiogenic Pb in zircon: a cause of anomalously high Pb-Pb, U-Pb and Th-Pb ages - Williams, I. S.; Compston, W.; Black, L. P.; Ireland, T. R.; Foster, J. J. (Springer, 1984)
http://dx.doi.org/10.1007/BF00376756
Keywords: TE-TZ