@article{CRMATH_2023__361_G3_679_0,
     author = {Xu, Wang and Zhou, Xiangyu},
     title = {Optimal $L^2$ {Extensions} of {Openness} {Type} and {Related} {Topics}},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {679--683},
     publisher = {Acad\'emie des sciences, Paris},
     volume = {361},
     number = {G3},
     year = {2023},
     doi = {10.5802/crmath.437},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5802/crmath.437/}
}