@article{DMGT_2023_43_3_a8,
     author = {Volkmann, Lutz},
     title = {Double {Roman} and double {Italian} domination},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {721--730},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2023_43_3_a8/}
}