Add text in Citation

Question

I want [1, Eqns. (4)-(6)]. For that I have written

\cite{citekey} Eqns. (4)-(6).

But it generates [1] Eqns. (4)-(6).
How to write [1, Eqns. (4)-(6)].?

Answer 1

You use \cite[text]{citekey} eg \cite[Eqns.~(4)--(6)]{citekey}

This creates, eg [1, Eqn 4--6].

One thing ye might watch with equations: these are numbered like (4)--(6) in the context of a chapter, but each chapter has its own run of numbers. So an equation in chapter 2 might be referred to in chapter 3 as 2.6.