by Blignault, C., Hattingh, D.G., Kruger, G.H., van Niekerk, T.I., James, M.N.
Published in Measurement : journal of the International Measurement Confederation (2008)

by Kruger, G.H., van Niekerk, T.I., Blignault, C., Hattingh, D.G.
Published in 2004 IEEE Africon. 7th Africon Conference in Africa (IEEE Cat. No.04CH37590) (2004)

by Kruger, G.H.J, Eloff, J.N
Published in Zeitschrift für Pflanzenphysiologie (01.12.1979)