Accessible Proof for Buchdahl's Theorem in General Relativity?

[lugita15]

Where can I find an accessible proof of Buchdahl's theorem, which states that in general relativity GM/(c^2*R) must be less than 4/9?

Any help would be greatly appreciated.

Thank You in Advance.

 

[elfmotat]

Where can I find an accessible proof of Buchdahl's theorem, which states that in general relativity GM/(c^2*R) must be less than 4/9?

Any help would be greatly appreciated.

Thank You in Advance.

If I remember correctly, Schutz has a chapter (or at least a section) on this. I don't have my copy with me at the moment so I can't check.