Smith ja Malthus
- https://www.economicsdiscussion.net/economics-2/adam-smith-theory-of-development-in-economics-main-features/4514
- Kohdat Production Function, Division of Labour ja Process of Growth
- https://www.economicsonline.co.uk/managing_the_economy/what-is-the-malthusian-theory-of-population.html/