by Stephens, D.E, Rumbold, K, Permaul, K, Prior, B.A, Singh, S
Published in Journal of biotechnology (2007)

by Martin, J.F, Stephens, D.E
Published in Agronomy journal (1931)

by Stephens, D.E
Published in South African medical journal (14.09.1957)

by Stephens, D.E. & Loewenthal, H.F.
Published in South African medical journal (04.05.1963)

by Stanton, D.E, Stephens, D.E, Bayles, B.B
Published in Agronomy journal (01.03.1928)