@article{SIGMA_2015_11_a6,
     author = {Tomoya Hattai and Tatsuro Ito},
     title = {On {a~Certain} {Subalgebra} of $U_q(\widehat{\mathfrak{sl}}_2)$ {Related} to the {Degenerate} $q${-Onsager} {Algebra}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2015},
     volume = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2015_11_a6/}
}