LaTeX help

I do not often do multiple citations in LaTeX, so I had to look up how to do them just now. This web site has some useful "cheat sheet" like information about LaTeX, including the information I wanted.

Multiple citations may be made by including more than one citation key in the \cite command argument.

\citet{jon90,jam91} => Jones et al. (1990); James et al. (1991)
\citep{jon90,jam91} => (Jones et al., 1990; James et al. 1991)
\citep{jon90,jon91} => (Jones et al., 1990, 1991)
\citep{jon90a,jon90b} => (Jones et al., 1990a,b)