Sara Cruz y Cruz, Oscar Rosas-Ortiz, “Dynamical Equations, Invariants and Spectrum Generating Algebras of Mechanical
Systems with Position-Dependent Mass”, SIGMA, 9 (2013), 004, 21 pp.
Nicolás Fernández-García, Oscar Rosas-Ortiz, “Rectangular Potentials in a Semi-Harmonic Background: Spectrum, Resonances and Dwell Time”, SIGMA, 7 (2011), 044, 17 pp.
