2006
Silins, U., Lieffers, V.J., Reid, D.E.B.
EFM Research Note 12/2006
Silins, Uldis, Lieffers, V.J., Reid, D.E.B.
EFM Research Nore 06/2006
2010
Wolken, J., Lieffers, V.J., Landhäusser, S.M.
EFM Research Note 04/2010