@article{SIGMA_2008_4_a42,
     author = {Dieter Schuch},
     title = {Riccati and {Ermakov} {Equations} in {Time-Dependent} and {Time-Independent} {Quantum} {Systems}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2008},
     volume = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2008_4_a42/}
}