Yeah usually something along these lines, if they press on first number I'd say something like, "I'm open to considering a variety of offers, but I'd have to see what the whole package looks like, and I'd really be interested in hearing more about the company first."

https://haseebq.com/my-ten-rules-for-negotiating-a-job-offer...

I don't know if this is the specific article addressing that question, but this guys writing on negotiations was very helpful to me.