The B2B Elements of Value
https://hbr.org/2018/03/the-b2b-elements-of-value
Category Communications and Pitching
Creating and Delivering Your Value Proposition: Managing Customer Experience for Profit
https://www.amazon.co.uk/Creating-Delivering-Your-Value-Proposition/dp/0749455128
Value Proposition Design
https://www.strategyzer.com/books/value-proposition-design