by Penman, Z.E, Schittkowski, T, Sleat, W, Reid, D.T, Sibbett, W
Published in Optics communications (15.10.1998)

by Penman, Z.E, Loza-Alvarez, P, Reid, D.T, Ebrahimzadeh, M, Sibbett, W, Jundt, D.H
Published in Optics communications (15.01.1998)

by Penman, Z. E., McGowan, C., Loza-alvarez, P., Reid, D. T., Ebrahimzadeh, M., Sibbett, W., Jundt, D. H.
Published in Journal of modern optics (01.06.1998)