https://pkghosh.wordpress.com/2012/09/03/from-item-correlation-to-rating-prediction/
https://pkghosh.wordpress.com/?s=recommendation
sifarish
https://github.com/pranab/sifarish
https://pkghosh.wordpress.com/2012/09/03/from-item-correlation-to-rating-prediction/
https://pkghosh.wordpress.com/?s=recommendation
sifarish
https://github.com/pranab/sifarish