Collaborative earth observing task assignment of multi-airships in emergency
IANG Jian-qing， ZHU Xiao-min， WU Guo-hua， HE Chuan， WU Chao-bo
Journal of Systems Engineering and Electronics . 2013, (2): 317 -325 .  DOI: 10.3969/j.issn.1001-506X.2013.02.14