Sarkar, S. (2005). Einstein's universe: The challenge of dark energy.
Cita Chicago (17th ed.)Sarkar, S. Einstein's Universe: The Challenge of Dark Energy. 2005.
Cita MLA (9th ed.)Sarkar, S. Einstein's Universe: The Challenge of Dark Energy. 2005.
Atenció: Aquestes cites poden no estar 100% correctes.