@article{DMGT_2021_41_4_a3,
     author = {Chen, Pingge and Liang, Jinhua and Peng, Yuejian},
     title = {The {Lagrangian} {Density} of {123, 234, 456} and the {Tur\'an} {Number} of its {Extension}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {905--921},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2021_41_4_a3/}
}