by Zachary, J.F., Sempsrott, J.M., Frizzell, L.A., Simpson, D.G., O'Brien, W.D.
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01.03.2001)

by Assentoft, J.E, Gregersen, H, O’Brien, W.D
Published in Ultrasonics (01.06.2001)

by Ozguler, A, Morris, S.A, O'Brien, W.D. Jr
Published in Journal of food science (01.07.1998)

by Safvi, A.A. (University of Illinois, Urbana.), Meerbaum, H.J, Morris, S.A, Harper, C.L, O'Brien, W.D. Jr
Published in Journal of food protection (01.03.1997)

by Gandhi, D.R., O'Brien, W.D., Jr
Published in 1993 Proceedings IEEE Ultrasonics Symposium (1993)

by Jensen, J.A., Gandhi, D., O'Brien, W.D., Jr
Published in 1993 Proceedings IEEE Ultrasonics Symposium (1993)

by Czerwinski, R.N., Jones, D.L., O'Brien, W.D., Jr
Published in 1993 Proceedings IEEE Ultrasonics Symposium (1993)

by Goldstein, A., Gandhi, D.R., O'Brien, W.D., Jr
Published in 1994 Proceedings of IEEE Ultrasonics Symposium (1994)

by Chen, E.J., Novakofski, J., Jenkins, K., O'Brien, W.D., Jr
Published in 1994 Proceedings of IEEE Ultrasonics Symposium (1994)

by Mamou, J., Oelze, M.L., O'Brien, W.D., Zachary, J.F.
Published in IEEE signal processing magazine (01.05.2006)