multiple sources in brackets

Hello list,

I ran across a problem I cannot solve by myself, unfortunately. Using 
jureco.bst I would like to cite multiple sources within brackets like 
this:
(vgl. zu den vorstehenden Ausführungen AEREBOE 1952, S. 260ff., 
BISCHOFF 1989, S. 1ff. und ALSING 1992, 78ff.)

Using the \citet option I only get
(vgl. zu den vorstehenden Ausführungen AEREBOE (1952, S. 260ff.), 
BISCHOFF (1989, S. 1ff.) und ALSING (1992, 78ff.))

Now what I want is to maintain the \citet for simple citations 
throughout the text as is (i.e. AEREBOE (1952)), but for multiple 
sources in brackets I would love to be able to drop the brackets around 
the years and pages. Is this at all possible?

Any help is greatly appreciated.

Stephan