Introduction to Einstein’s Theory of Relativity From Newton’s Attractive Gravity to the Repulsive Gravity of Vacuum Energy Grøn, Øyvind Heftet / 2020 / Engelsk
Einstein's General Theory of Relativity With Modern Applications in Cosmology Grøn, Øyvind Heftet / 2010 / Engelsk
Einstein's General Theory of Relativity With Modern Applications in Cosmology Grøn, Øyvind Innbundet / 2026 / Engelsk
