@article{article7bc83abf,
title   = {The effect of the negative coupling parameter on the spectrum of a trapped Bose gas},
author = {Sousa, A. G. and Silva, Alberico Borges Ferreira da and Bagnato, Vanderlei Salvador},
year = {2010},
doi = {10.1007/s10910-009-9591-8},
journal   = {Journal of Mathematical Chemistry}
}