@Article{zbMATH06908073,
Author = {Huahui {Shang} and Lianying {Miao}},
Title = {{On the lower bounds of two signed domination number of a graph.}},
FJournal = {{Mathematics in Practice and Theory}},
Journal = {{Math. Pract. Theory}},
ISSN = {1000-0984},
Volume = {47},
Number = {21},
Pages = {223--230},
Year = {2017},
Language = {Chinese},
MSC2010 = {05C69},
Zbl = {1399.05175}
}