Bibliography (11):

1. ZMA Benefits, Dosage, and Side Effects

2. https://web.archive.org/web/20170709193249/https://www.powdercity.com/products/zma-benefits

3. ​ Potassium sleep experiments

4. ​ Nootropics § Magnesium

   [Transclude the forward-link's context]

5. ​ CO₂/ventilation sleep experiment

6. Wikipedia Bibliography:

   1. ZMA (supplement)  :

      https://en.wikipedia.org/wiki/ZMA_(supplement)

   2. Zinc

   3. Magnesium

   4. Vitamin B6  :

      https://en.wikipedia.org/wiki/Vitamin_B6

   5. Tianeptine  :

      https://en.wikipedia.org/wiki/Tianeptine

   6. Pyridoxine  :

      https://en.wikipedia.org/wiki/Pyridoxine