@article{SIGMA_2018_14_a43,
     author = {Paul Terwilliger},
     title = {The $q${-Onsager} {Algebra} and the {Universal} {Askey{\textendash}Wilson} {Algebra}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2018},
     volume = {14},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2018_14_a43/}
}