Zezong, Xi, '' The Discovery of Jupiter 's Satellite Made by Gan De 2000 years Before Galileo ",' Chinese Physics 2 -LRB- 3 -RRB- -LRB- 1982 -RRB- : 664 -- 67.
Xi Zezong, '' The Discovery of Jupiter 's Satellite Made by Gan De 2000 years Before Galileo ",' Chinese Physics 2 -LRB- 3 -RRB- -LRB- 1982 -RRB- : 664-67.