https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Big_Ideas_in_Cosmology_(Coble_et_al.)
https://jila.colorado.edu/~ajsh/home.html
https://pubmed.ncbi.nlm.nih.gov/?term=Rajantie%20A%5BAuthor%5D
http://csep10.phys.utk.edu/OJTA2dev/ojta/c2c/early/inflationary/cosmology_tl.html#:~:text=Unified%20Theories&text=Only%20when%20the%20temperature%20dropped,see%20in%20our%20present%20Universe.