What Are the Key Resources for Understanding Wormholes and White Holes?

pythagoras88
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Hi, I've recently finished a course on GR, and would like to read up more on wormhole and white hole. May I ask if there are any papers, websites or books that introduces the mathematical and physical structure of these stuffs?
 
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For wormhole, try "Lorentzian Wormholes: From Einstein to Hawking" by Matt Visser.
 
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