@article{SIGMA_2022_18_a4,
     author = {Ian Marquette and Christiane Quesne},
     title = {Ladder {Operators} and {Hidden} {Algebras} for {Shape} {Invariant} {Nonseparable} and {Nondiagonalizable} {Models} with {Quadratic} {Complex} {Interaction.} {II.~Three-Dimensional} {Model}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2022},
     volume = {18},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2022_18_a4/}
}