Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :
Casio fx-CG50 PRIZM calculator review - The Gadgeteer
CASIO FX-CG50 - ORDER ONLINE NOW !
Calculate and solve equations with complex numbers using the fx CG50 - YouTube
Eddie's Math and Calculator Blog: Casio fx-CG50 Review (updated 3/2/2018)
Buy Casio FX-CG50 Scientific Graphic Calculator (Black) Online at Best Prices in India - JioMart.