@article{SEMR_2023_20_2_a34,
     author = {A. A. Dobrynin},
     title = {Edge $4$-critical {Koester} graph of order $28$},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {847--853},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2023_20_2_a34/}
}