Hsiang, W.Y.W.Y.HsiangChang, H.C.H.C.ChangYao, H.H.YaoChen, P.J.P.J.Chen2012-03-092018-06-282012-03-092018-06-282011http://ntur.lib.ntu.edu.tw//handle/246246/238875en-USAn alternative way to achieve Kepler's laws of equal areas and ellipses for the Earthjournal article10.1088/0143-0807/32/5/028http://ntur.lib.ntu.edu.tw/bitstream/246246/238875/-1/29.pdf