@article{DMGT_2022_42_4_a6,
     author = {Li, Sha-Sha and Yin, Jian-Hua and Li, Jia-Yun},
     title = {The {Tur\'an} {Number} for 4 {\textperiodcentered} {S\protect\textsubscript{\ensuremath{\ell}}}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {1119--1128},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2022_42_4_a6/}
}