@article{10_26493_1855_3974_2284_aeb, author = {Abel Cabrera Mart{\'\i}nez and Juan Alberto Rodr{\'\i}guez-Vel\'azquez}, title = { {Closed} formulas for the total {Roman} domination number of lexicographic product graphs }, journal = {Ars Mathematica Contemporanea}, pages = {233--241}, publisher = {mathdoc}, volume = {20}, number = {2}, year = {2021}, doi = {10.26493/1855-3974.2284.aeb}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.2284.aeb/} }