Activities of γ-ray emitting isotopes in rainwater from Greater Sudbury, Canada following the Fukushima incident B. T. Cleveland et al.
arXiv:1201.3970 (Jan 2012)

The Construction and Anticipated Science of SNOLAB F. Duncan et al.
Annu. Rev. Nucl. Part Sci. 2010. 60: 163-80

Measurement of the thorium-228 activity in solutions cavitated by ultrasonic sound
R. Ford et al.
Physics Letters A, Volume 374, Issue 5, 18 January 2010, Pages 701-703
arXiv:0911.1387 (Sep 2011)

Shotcrete Application in SNOLAB
S. Bhan, F. Duncan, I. Lawson, C. McDonald
Shotcrete Magazine, Vol 9, No 4, 2007 (PDF)