Tài liệu tham khảo WikiPedia: 17_Thetis http://www.astrosurf.com/aude-old/map_files/AstVar... http://www.springerlink.com/content/h747307j438632... http://www.psi.edu/pds/archive/astdata04/simps04/d... http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&b... http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=17 http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=17;orb=1 //doi.org/10.1007%2Fs10569-007-9103-8 https://web.archive.org/web/20051127063200/http://... https://web.archive.org/web/20060623213811/http://... https://web.archive.org/web/20110224014158/http://...
