The SABR implied volatility is often used as an input in Black's model to price swaptions, caps, and other interest rate derivatives.
I'm wondering whether you can use the SABR closed form solution of the implied volatility curve as input into Black-Scholes European Call option formula?
Do you know any articles that uses SABR's implied volatility as input into the Black-Scholes equation to price european equity call options? Do you see any problems doing that?
Thank you in advance!