@article{10_37236_8245,
     author = {Fei Xue},
     title = {On the lattice point covering problem in dimension 2},
     journal = {The electronic journal of combinatorics},
     year = {2019},
     volume = {26},
     number = {2},
     doi = {10.37236/8245},
     zbl = {1415.52009},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/8245/}
}