@article{ASUO_2013_XXI_3_a12,
     author = {Xiang Gao and Qiaofang Xing and Rongrong Cao},
     title = {Estimates on the non-compact expanding
                            gradient {Ricci} solitons},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XXI},
     number = {3},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2013_XXI_3_a12/}
}