by O'Callaghan, J.R., Houlihan, J., Voignier, V., Wu, G.H., O'Neill, E., McInerney, J.G., Huyet, G.
Published in IEEE journal of quantum electronics (01.01.2004)

by O'Callaghan, J.R., Houlihan, J., Voignier, V., Huyet, G., McInerney, J.G., Corbett, B., O'Brien, P.A.
Published in IEEE photonics technology letters (01.01.2002)

by O'Callaghan, J.R., Hossain, A.H.M.S., Dahab, M.H., Wyseure, G.C.L.
Published in Computers and electronics in agriculture (01.12.1994)

by Hettiaratchi, D.R.P, O'Callaghan, J.R
Year of Publication 1985

by O'Callaghan, J.R.
Published in Soil & tillage research (01.06.1994)

by O'Callaghan, J.R., Maende, C., Wyseure, G.C.L.
Published in Computers and electronics in agriculture (01.12.1994)

by O'Callaghan, J.R., Dahab, M.H., Hossain, A.H.M.S., Wyseure, G.C.L.
Published in Computers and electronics in agriculture (1994)

by Wyseure, G.C.L., Sanmuganathan, K., O'Callaghan, J.R.
Published in Computers and electronics in agriculture (01.12.1994)

by O'Callaghan, J.R., Hossain, A.H.M.S., Wyseure, G.C.L.
Published in Computers and electronics in agriculture (01.12.1994)

by Murphy, D.P.L., Dahab, M.H., Wyseure, G.C.L., O'Callaghan, J.R.
Published in Computers and electronics in agriculture (1994)

by Flowers, T.H., O'Callaghan, J.R.
Published in Soil biology & biochemistry (1983)

by Sarker, R.I, Hettiaratchi, D.R.P, O'Callaghan, J.R
Year of Publication 1985

by Liang, Y, Hettiaratchi, D.R.P, O'Callaghan, J.R
Year of Publication 1985

by Magowan, T.J., O'Callaghan, J.R.
Published in Agricultural systems (1986)

by O'Callaghan, J.R, Wyseure, G.C.L. (Dep. Agricultural and Environmental Science, University of Newcastle upon Tyne, NE1 7RU (United Kingdom))
Year of Publication 1994

by O'Callaghan, J.R
Published in Computers and electronics in agriculture (1994)

by Faborode, M.O., O'Callaghan, J.R.
Published in Journal of agricultural engineering research (1987)

by Faborode, M.O., O’Callaghan, J.R.
Published in Journal of agricultural engineering research (1986)

by Hettiaratchi, D.R.P., O'Callaghan, J.R.
Published in Journal of theoretical biology (01.01.1974)

by O'Neill, E., McInerney, J.G., O'Callaghan, J.R., Huyet, G.
Published in Electronics letters (13.05.2004)