@article{DMGT_2021_41_2_a16,
     author = {Doan, Trung Duy and Schiermeyer, Ingo},
     title = {Conflict-Free {Vertex} {Connection} {Number} at {Most} 3 and {Size} of {Graphs}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {617--632},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2021_41_2_a16/}
}