de Micheli, Fiorenza; Zanelli, Jorge Quantum degenerate systems. (English) Zbl 1285.81043 J. Math. Phys. 53, No. 10, 102112, 14 p. (2012). MSC: 81S10 37J05 PDFBibTeX XMLCite \textit{F. de Micheli} and \textit{J. Zanelli}, J. Math. Phys. 53, No. 10, 102112, 14 p. (2012; Zbl 1285.81043) Full Text: DOI arXiv Link
Saavedra, Joel; Troncoso, Ricardo; Zanelli, Jorge Degenerate dynamical systems. (English) Zbl 1063.37054 J. Math. Phys. 42, No. 9, 4383-4390 (2001). MSC: 37J99 37N99 70G40 70H99 81-XX PDFBibTeX XMLCite \textit{J. Saavedra} et al., J. Math. Phys. 42, No. 9, 4383--4390 (2001; Zbl 1063.37054) Full Text: DOI arXiv Link