by Matjie, R.H., Bunt, J.R., van Heerden, J.H.P.
Published in Minerals engineering (01.03.2005)

by SAGHAFI, A, PINETOWN, K. L, GROBLER, P. G, VAN HEERDEN, J. H. P
Published in International journal of coal geology (07.01.2008)

by van Dyk, J.C., Baxter, L.L., van Heerden, J.H.P., Coetzer, R.L.J.
Published in Fuel (Guildford) (01.10.2005)

by Wagner, N.J., Matjie, R.H., Slaghuis, J.H., van Heerden, J.H.P.
Published in Fuel (Guildford) (01.05.2008)

by Saghafi, A., Pinetown, K.L., Grobler, P.G., van Heerden, J.H.P.
Published in International journal of coal geology (2008)

by van Dyk, J.C., Waanders, F.B., van Heerden, J.H.P.
Published in Fuel (Guildford) (01.09.2008)

by P. Styger, J. H.P. Van Heerden
Published in South African journal of business management (01.03.1987)