Multiple References
\citet[see][]{goossens:companion,goossens:companion2,hagen:metafun} — von Goossens et al. [see 1997; 2000], Hagen [see 2000]
\citep{goossens:companion,goossens:companion2,hagen:metafun} — [von Goossens et al., 1997; 2000, Hagen, 2000]
\citealt[see][]{goossens:companion,goossens:companion2,hagen:metafun} — von Goossens et al. see 1997; 2000, Hagen see 2000
\citealp[see][]{goossens:companion,goossens:companion2,hagen:metafun} — see von Goossens et al., 1997; 2000, Hagen, 2000
Hans Hagen. Metafun. Preliminary Version October 27, 2000, October 2000. http://www.pragma-ade.com.
M. von Goossens, S. Rahtz, and F. Mittelbach. The LaTeX Graphics Companion. Addison-Wesley Publishing Company, Reading, Mass., 1997.
M. von Goossens, S. Rahtz, and F. Mittelbach. The LaTeX Graphics Companion. Addison-Wesley Publishing Company, Reading, Mass., 2000.