https://powerbi.microsoft.com/en-us/blog/

https://exceleratorbi.com.au/blog/

https://datachant.com/

https://www.academia.edu/36243555/Analyzing_Data_with_Power_BI.pdf

https://www.powerpivotpro.com/wp-content/uploads/2015/10/PowerPivotPro-Reference-Card.pdf

https://yodalearning.com/tutorials/power-bi-dax-basics-power-bi-dax-function-list/

http://www.powerpivot-info.com/public_files/cheat-sheet/powerpivot-dax-functions-long.pdf