http://midnightinthedesert.com/rob-shelsky ,
https://en.wikipedia.org/wiki/Introduction_to_M-theory ,
https://www.quantamagazine.org/why-is-m-theory-the-leading-candidate-for-theory-of-everything-20171218 ,
http://www.damtp.cam.ac.uk/research/gr/public/qg_ss.html ,
https://en.wikipedia.org/wiki/M-theory ,
http://theconversation.com/stephen-hawking-had-pinned-his-hopes-on-m-theory-to-fully-explain-the-universe-heres-what-it-is-93440 ,
https://physicsworld.com/a/what-is-m-theory
https://www.google.ca/search?ei=fVCsWo_FK5LcjwPunbeQBg&q=m+theory&oq=m+theory&gs_l=psy-ab.3...7354.11799.0.12264.0.0.0.0.0.0.0.0..0.0....0...1.1.64.psy-ab..0.0.0....0.dSa5p3kdi24
