2004
Lieffers, V.J., Amponsah, I.G., Comeau, P.G., Brockley, R.P.
EFM Research Note 01/2004
2005
Comeau, P.G., Lieffers, V.J., Amponsah, I.G., Landhäusser, S.M.
EFM Research Note 02/2005