McDowell, Jonathan (February 22, 1998). "Issue 350". Jonathan's Space Report. Jonathan's Space Page. Archived from the original on May 3, 2010. Retrieved January 25, 2010.
Day, Dwayne (February 11, 2013). "Athena rising?". The Space Review.
web.archive.org
McDowell, Jonathan (February 22, 1998). "Issue 350". Jonathan's Space Report. Jonathan's Space Page. Archived from the original on May 3, 2010. Retrieved January 25, 2010.