1. Abela, R., Amato, A., Baines C., et al. (1999). Hyperfine Interactions, 120, 575.
2. Amato, A., Luetkens, H., Sedlak, K., et al. (2017). Review of Scientific Instruments, 88, 093301.
3. Beveridge, J. L. (1992). Zeitschrift für Physik C Particles and Fields, 56, S258.
4. Brewer, J. H., Crowe, K. M., Gygax, F. N., et al. (1975). In V. W. Hughes, & C. S. Wu (Eds.), Muon Physics: Chemistry and Solids (Vol. III). Academic Press. ISBN: 978-0123606037.
5. Cottrell, S., Cox, S., Scott, C., et al. (2000). Physica B: Condensed Matter, 693, 289–290.