https://pmc.ncbi.nlm.nih.gov/articles/PMC7176745/#:~:text=These%20changes%20can%20be%20deduced,(13%E2%80%9020%20Hz).&text=Delta%20waves%20are%20more%20frequent,an%20increase%20in%20theta%20waves.
https://www.cia.gov/readingroom/docs/cia-rdp96-00788r001700210016-5.pdf
https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(16)30075-X/fulltext
https://nhahealth.com/brainwaves-the-language/
https://thetaforever.com/blogs/news/harnessing-the-power-of-theta-brain-waves-benefits-for-mind-and-body
https://www.wired.com/story/therapy-broken-mental-health-challenges/
https://www.linkedin.com/pulse/how-brainwaves-can-help-child-parent-rohan-girdhani/
https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/brain-waves
https://www.mindbodygreen.com/articles/theta-waves
https://www.davincimedicalusa.com/theta-chamber?srsltid=AfmBOorto6rUGz6x4pHZZodKVhJzExvvPolgrBXG7Hylyia0kB-h49X-
https://finmasters.com/warren-buffett-net-worth/#gref
https://www.forbes.com/real-time-billionaires/#15b967a23d78