Energy levels of a particle confined in a super-circular box N. Bera, J. K. Bhattacharjee, S. Mitra and S. P. Khastgir Eur. Phys. J. D, 46 1 (2008) 41-50 Published online: 05 October 2007 DOI: 10.1140/epjd/e2007-00282-6