New superintegrable models with position-dependent mass from Bertrand's Theorem on curved spaces

Article: 
New superintegrable models with position-dependent mass from Bertrand's Theorem on curved spaces
Authors: 
Angel Ballesteros, Alberto Enciso, Francisco J. Herranz, Orlando Ragnisco, Danilo Riglioni
Journal: 
J. Phys.: Conf. Ser
Year: 
2011
URL: 
http://iopscience.iop.org/1742-6596/284/1/012011/pdf/1742-6596_284_1_012011.pdf