by Oxman, L E, Santos-Rosa, G C, Teixeira, B F I
Published in Journal of physics. A, Mathematical and theoretical (01.08.2014)

by Oxman, L E, Santos Rosa, G C, Teixeira, B F I
Published in arXiv.org (21.07.2014)

by A L L de Lemos, Oxman, L E, Teixeira, B F I
Published in arXiv.org (04.05.2011)