The Functional Gradient Description Method of Space Coordinate Transformation
DUAN Pengshuo LIU Gengyou GONG Youliang HAO Xiaoguang WANG Nazi
Acta Geodaetica et Cartographica Sinica . 2014, (10): 1005 -1012 .  DOI: 10.13485/j.cnki.11-2089.2014.0145