https://www.cnn.com/2017/07/24/health/time-famine-stress-happiness-study/index.html#amp_tf=%E4%BE%86%E6%BA%90%EF%BC%9A%251%24s&aoh=16725945227005&csi=1&referrer=https%3A%2F%2Fwww.google.com&share=https%3A%2F%2Fwww.cnn.com%2F2017%2F07%2F24%2Fhealth%2Ftime-famine-stress-happiness-study%2Findex.html
https://insighttimer.com/blog/time-famine/