Spectrum generating algebra for the continuous spectrum of a free particle in Lobachevski space

Article: 
Spectrum generating algebra for the continuous spectrum of a free particle in Lobachevski space
Authors: 
M. Gadella, J. Negro, G.P. Pronko, M. Santander
Journal: 
Preprint-arXiv
Year: 
2012
URL: 
http://arxiv.org/abs/1201.2820