A lower bound of k-component restrained domination number in trees
CHEN Hong-Yu, ZOU Qing-Song：School of Mathematics, Shandong University, Jinan 250100, Shandong, China; NIU Cui-Xia ： School of Information ＆ Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, Shandong, China
