Для дополнительного чтения

Aw T. Map of the Invisible World. — London: Fourth Estate, 2010.

Levenson T. The Hunt for Vulcan... And how Albert Einstein destroyed a planet, discovered relativity and deciphered the Universe. — London: Head of Zeus, 2015.

Schilling G. The Hunt for Planet X. — New York: Copernicus Books, 2009.