@article{10_14712_1213_7243_2022_023,
     author = {Logunov, Sergei},
     title = {On butterfly-points in $\beta X$, {Tychonoff} products and weak {Lindel\"of} numbers},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {379--383},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {2022},
     doi = {10.14712/1213-7243.2022.023},
     mrnumber = {4542796},
     zbl = {07655807},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2022.023/}
}