@article{Xu2022, 
author = {Ming Xu and Yue Wang},
title = {Message from the Guest Editors of the Special Issue in Memory of Professor Shijie Xu},
year = {2022},
journal = {Astrodynamics},
volume = {6},
number = {3},
pages = {235},
url = {https://www.sciopen.com/article/10.1007/s42064-022-0141-5},
doi = {10.1007/s42064-022-0141-5},
abstract = {}
}