A Conjecture on Zero-sum 3-magic Labeling of 5-regular Graphs
  In this paper, we obtained that every 5-regular graph admits a zero-sum 3-magic labeling, which give an affirmative answer to a conjecture proposed by Saieed Akbari, Farhad Rahmati and Sanaz Zare in $Electron.$ $J.$ $Combin.$. 
Guanghuang Dong and Ning Wang
math.CO