by Fraser, G.W., Pain, M.T., Lees, J.E., Binns, C.R., Pearson, J.F., Houghton, P.R.
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (15.09.1992)

by Miller, D.J. (Oregon State University), Houghton, P.R
Published in Proceedings ... annual meeting - American Wood-Preservers' Association (USA) (1990)

by Miller D.J, Houghton P.R
Published in Forest products journal (1981)