by Koch, A.C., Ramgareeb, S., Snyman, S.J., Watt, M.P., Rutherford, R.S.
Published in South African journal of botany (01.04.2010)

by Block, K.I, Koch, A.C, Mead, M.N
Published in Alternative medicine review (01.09.2008)

by Koch, A.C., Beddoes, M.P.
Published in Proceedings of Canadian Conference on Electrical and Computer Engineering (1993)

by Meyer, B.J., Norval, E., Meyer, A.C. & Koch, H. v. O
Published in South African medical journal (01.07.1972)