முனைவாக்கம், மூலக்கூறு, மூலதனம்

மேலதிக வாசிப்புக்கு:#

1. ஒளிவினை பற்றிய விளக்கங்களுக்கு: Crystals and Optics, Elizabeth Wood, Dover Publications.

2. Pill Pushers,  Robert Langreth and Matthew Herper, Forbes, May 08, 2006 (http://www.forbes.com/business/forbes/2006/0508/094a_4.html).

3. High Prices - How to think about drugs, Malcom Gladwell, New Yorker, Oct. 25, 2004  (http://www.newyorker.com/archive/2004/10/25/041025crat_atlarge).

4. US Presidential Elections - Long term contribution trends, Pharmaceuticals/Health products, (http://opensecrets.org/industries/indus.asp?Ind=H04).

5. Questions and Answers: NDMA impurities in ranitidine (commonly known as Zantac), (https://www.fda.gov/drugs/drug-safety-and-availability/questions-and-answers-ndma-impurities-ranitidine-commonly-known-zantac).

6. Ranitidine still widely used five years after global ban over cancer risk, India to assess safety, https://thesouthfirst.com/health/ranitidine-still-widely-used-five-years-after-global-ban-over-cancer-risk-india-to-assess-safety/